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PROX

PROX

PROX

Prox Pistons, Gaskets, and Engine Components at JJ Motorsports

Prox, established in the late 1970s, is a respected brand in the powersports industry, specializing in high-performance aftermarket parts for motorcycles, ATVs, and off-road vehicles. With a focus on quality and innovation, Prox offers OEM-style replacements that deliver exceptional reliability and performance for both recreational riders and professionals.

At JJ Motorsports, we provide a comprehensive selection of Prox products, including complete gasket kits, top-end gasket sets, piston kits, connecting rod kits, crankshaft bearing/seal kits, and more. Whether you're rebuilding an engine or upgrading for better durability, Prox delivers precise-fit solutions compatible with major brands like Honda, Kawasaki, Suzuki, and KTM. Explore our inventory to find the ideal parts for your vehicle.

Key features of Prox products include precision engineering to OEM specifications, use of high-silicon-content aluminum alloys for pistons, double-forged construction for strength, and complete kits for easy installation. Shop now and enhance your powersports performance with Prox!

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • PROX Valveshim - 10.00 x 2.55 - 5 pack 29.100255

    PROX Valveshim - 10.00 x 2.55 - 5 pack 29.100255

    PROX

    $10.95
    Valve shims are critical to maintaining proper valve clearance and engine performance, and worn or damaged shims can lead to costly compression loss and improper valve timing. The PROX Valveshim 10...
    09261004
    SKU:
    09261004
    Availability:
    Ships Same Business Day
    Weight:
    0.02 LBS
    RIDING STYLE:
    OFF-ROAD
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    SHIM KIT
    TYPE:
    VALVE
    UNITS:
    5 PACK
    VALVE SHIM THICKNESS METRIC:
    2.55 MM
    OUTSIDE DIAMETER METRIC:
    10.00 MM
    $10.95
    Qty in Cart: 0
    Quantity:
    Price:
    $10.95
    Subtotal:
  • PROX Piston Kit 01.6604.B

    PROX Piston Kit 01.6604.B

    PROX

    $229.95
    When your engine's original pistons show signs of wear, a quality replacement kit is essential to restore compression, reliability, and performance. The PROX Piston Kit 01.6604.B delivers...
    09101524
    SKU:
    09101524
    Availability:
    Ships Same Business Day
    Weight:
    1.16 LBS
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    RIDING STYLE:
    OFF-ROAD
    PISTON SIZE METRIC:
    STANDARD SIZE B
    UNITS:
    EACH
    BORE SIZE METRIC:
    100.95 MM
    PISTON DIAMETER METRIC:
    100.95 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    Qty in Cart: 0
    Quantity:
    Price:
    $229.95
    Subtotal:
  • PROX Piston Kit 01.2409.A

    PROX Piston Kit 01.2409.A

    PROX

    $179.95
    A piston kit is critical to engine reliability and performance—worn or damaged pistons lead to compression loss, increased blow-by, and potential catastrophic engine failure. The PROX Piston Kit 01...
    09101609
    SKU:
    09101609
    Availability:
    Ships Same Business Day
    Weight:
    0.54 LBS
    BORE SIZE METRIC:
    76.95 MM
    PRODUCT NAME:
    PISTON KIT
    PISTON DIAMETER METRIC:
    76.95 MM
    PISTON SIZE METRIC:
    STANDARD SIZE A
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.1338.A

    PROX Piston Kit 01.1338.A

    PROX

    $188.95
    A worn or damaged piston compromises compression, throttle response, and fuel efficiency—ultimately costing you performance and reliability. The PROX Piston Kit 01.1338.A restores your engine to OEM...
    09101126
    SKU:
    09101126
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    BORE SIZE METRIC:
    77.97 MM
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    PISTON DIAMETER METRIC:
    77.97 MM
    RIDING STYLE:
    OFF-ROAD
    $188.95
    Qty in Cart: 0
    Quantity:
    Price:
    $188.95
    Subtotal:
  • PROX Piston Kit 01.1338.C

    PROX Piston Kit 01.1338.C

    PROX

    $188.95
    When your engine's internals are worn or damaged, OEM-equivalent pistons are non-negotiable for reliable performance and longevity. The PROX Piston Kit 01.1338.C delivers factory-quality construction...
    09101128
    SKU:
    09101128
    Availability:
    Ships Same Business Day
    Weight:
    0.51 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    ENGINE TYPE:
    4-STROKE
    BORE SIZE METRIC:
    77.99 MM
    RIDING STYLE:
    OFF-ROAD
    PISTON DIAMETER METRIC:
    77.99 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    $188.95
    Qty in Cart: 0
    Quantity:
    Price:
    $188.95
    Subtotal:
  • PROX Piston Kit 01.1339.B

    PROX Piston Kit 01.1339.B

    PROX

    $185.95
    When your engine's pistons show wear or you're rebuilding after a high-mileage season, settling for substandard replacements risks catastrophic failure and lost performance. The PROX Piston Kit 01...
    09101130
    SKU:
    09101130
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    77.98 MM
    PISTON SIZE METRIC:
    STANDARD SIZE B
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    77.98 MM
    PRODUCT NAME:
    PISTON KIT
    $185.95
    Qty in Cart: 0
    Quantity:
    Price:
    $185.95
    Subtotal:
  • PROX Piston Kit 01.2406.C

    PROX Piston Kit 01.2406.C

    PROX

    $179.95
    When your engine demands reliability and precision, OEM-quality pistons are non-negotiable. The PROX Piston Kit 01.2406.C delivers Japanese manufacturing standards with CNC-machined tolerances that...
    09101133
    SKU:
    09101133
    Availability:
    Ships Same Business Day
    Weight:
    0.57 LBS
    PISTON DIAMETER METRIC:
    76.97 MM
    BORE SIZE METRIC:
    76.97 MM
    RIDING STYLE:
    OFF-ROAD
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    PISTON SIZE METRIC:
    STANDARD SIZE A
    PRODUCT NAME:
    PISTON KIT
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.2427.C

    PROX Piston Kit 01.2427.C

    PROX

    $185.95
    When your engine demands precision and reliability, compromised pistons will cost you races and credibility. The PROX Piston Kit 01.2427.C delivers OEM-equivalent performance with the tight...
    09101139
    SKU:
    09101139
    Availability:
    Ships Same Business Day
    Weight:
    0.86 LBS
    PRODUCT NAME:
    PISTON KIT
    PISTON DIAMETER METRIC:
    94.97 MM
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    94.97 MM
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    STANDARD SIZE C
    UNITS:
    EACH
    $185.95
    Qty in Cart: 0
    Quantity:
    Price:
    $185.95
    Subtotal:
  • PROX Piston Kit 01.3338.A

    PROX Piston Kit 01.3338.A

    PROX

    $188.95
    A piston kit is the foundation of reliable engine performance—worn or inadequate pistons lead to compression loss, poor combustion, and premature engine failure. The PROX Piston Kit 01.3338.A...
    09101145
    SKU:
    09101145
    Availability:
    Ships Same Business Day
    Weight:
    0.48 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    BORE SIZE METRIC:
    76.96 MM
    PISTON SIZE METRIC:
    STANDARD SIZE A
    PISTON DIAMETER METRIC:
    76.96 MM
    PRODUCT NAME:
    PISTON KIT
    $188.95
    Qty in Cart: 0
    Quantity:
    Price:
    $188.95
    Subtotal:
  • PROX Piston Kit 01.3338.B

    PROX Piston Kit 01.3338.B

    PROX

    $179.95
    When your engine's pistons show wear or you're rebuilding for reliability, OEM-equivalent performance is non-negotiable. The PROX Piston Kit 01.3338.B delivers factory-specification durability...
    09101146
    SKU:
    09101146
    Availability:
    Ships Same Business Day
    Weight:
    0.48 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    PISTON DIAMETER METRIC:
    76.97 MM
    PISTON SIZE METRIC:
    STANDARD SIZE B
    BORE SIZE METRIC:
    76.97 MM
    PRODUCT NAME:
    PISTON KIT
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.3410.A

    PROX Piston Kit 01.3410.A

    PROX

    $189.95
    A piston kit is one of the most critical components in your engine's combustion chamber—it directly impacts compression ratio, thermal efficiency, and overall power output. The PROX Piston Kit 01...
    09101148
    SKU:
    09101148
    Availability:
    Ships Same Business Day
    Weight:
    0.83 LBS
    BORE SIZE METRIC:
    95.47 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    PISTON DIAMETER METRIC:
    95.47 MM
    RIDING STYLE:
    OFF-ROAD
    PISTON SIZE METRIC:
    STANDARD SIZE A
    PRODUCT NAME:
    PISTON KIT
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.3410.B

    PROX Piston Kit 01.3410.B

    PROX

    $189.95
    Your engine's reliability depends on pistons that can handle sustained high RPM loads without sacrifice. The PROX Piston Kit 01.3410.B delivers OEM-equivalent performance with precision manufacturing...
    09101149
    SKU:
    09101149
    Availability:
    Ships Same Business Day
    Weight:
    0.83 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    STANDARD SIZE B
    UNITS:
    EACH
    BORE SIZE METRIC:
    95.48 MM
    RIDING STYLE:
    OFF-ROAD
    PISTON DIAMETER METRIC:
    95.48 MM
    PRODUCT NAME:
    PISTON KIT
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.3410.C

    PROX Piston Kit 01.3410.C

    PROX

    $189.95
    When your engine demands reliability at high RPM, OEM-quality pistons are non-negotiable. The PROX Piston Kit 013410C delivers factory-specification performance with Japanese manufacturing precision,...
    09101150
    SKU:
    09101150
    Availability:
    Ships Same Business Day
    Weight:
    0.82 LBS
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    95.49 MM
    PISTON DIAMETER METRIC:
    95.49 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    STANDARD SIZE C
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.4337.A

    PROX Piston Kit 01.4337.A

    PROX

    $179.95
    A piston kit is the core of your engine's combustion cycle—when it fails or wears, power delivery suffers and reliability tanks. The PROX Piston Kit 01.4337.A delivers factory-matched performance...
    09101153
    SKU:
    09101153
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    BORE SIZE METRIC:
    76.96 MM
    PISTON SIZE METRIC:
    STANDARD SIZE A
    PISTON DIAMETER METRIC:
    76.96 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.4337.B

    PROX Piston Kit 01.4337.B

    PROX

    $188.95
    When your engine demands precision and reliability, compromised pistons aren't an option. The PROX Piston Kit 01.4337.B delivers OEM-equivalent performance with the durability required for...
    09101154
    SKU:
    09101154
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    PISTON SIZE METRIC:
    STANDARD SIZE B
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    UNITS:
    EACH
    BORE SIZE METRIC:
    76.97 MM
    PISTON DIAMETER METRIC:
    76.97 MM
    $188.95
    Qty in Cart: 0
    Quantity:
    Price:
    $188.95
    Subtotal:
  • PROX Piston Kit 01.4337.C

    PROX Piston Kit 01.4337.C

    PROX

    $179.95
    When your engine demands reliability under extreme conditions, OEM-quality pistons aren't optional—they're essential. The PROX Piston Kit 01.4337.C delivers factory-spec performance with precision...
    09101155
    SKU:
    09101155
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    PRODUCT NAME:
    PISTON KIT
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    BORE SIZE METRIC:
    76.98 MM
    PISTON DIAMETER METRIC:
    76.98 MM
    RIDING STYLE:
    OFF-ROAD
    PISTON SIZE METRIC:
    STANDARD SIZE C
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.4406.A

    PROX Piston Kit 01.4406.A

    PROX

    $210.95
    Your engine's pistons are the hardworking heart of combustion—they convert fuel into power thousands of times per minute. When OEM pistons wear, fatigue, or fail, performance drops and reliability...
    09101156
    SKU:
    09101156
    Availability:
    Ships Same Business Day
    Weight:
    0.92 LBS
    BORE SIZE METRIC:
    95.97 MM
    PISTON SIZE METRIC:
    STANDARD SIZE A
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    OFF-ROAD
    PISTON DIAMETER METRIC:
    95.97 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $210.95
    Subtotal:
  • PROX Piston Kit 01.4406.B

    PROX Piston Kit 01.4406.B

    PROX

    $189.95
    A worn or damaged piston kit compromises combustion efficiency, power delivery, and engine longevity. The PROX Piston Kit 01.4406.B restores OEM-level performance with precision-engineered components...
    09101157
    SKU:
    09101157
    Availability:
    Ships Same Business Day
    Weight:
    0.91 LBS
    BORE SIZE METRIC:
    95.98 MM
    PRODUCT NAME:
    PISTON KIT
    PISTON SIZE METRIC:
    STANDARD SIZE B
    PISTON DIAMETER METRIC:
    95.98 MM
    RIDING STYLE:
    OFF-ROAD
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.4406.C

    PROX Piston Kit 01.4406.C

    PROX

    $189.95
    When your engine is pushing limits, your pistons need to match that intensity. The PROX Piston Kit 01.4406.C delivers OEM-equivalent reliability with Japanese manufacturing precision, ensuring...
    09101158
    SKU:
    09101158
    Availability:
    Ships Same Business Day
    Weight:
    0.92 LBS
    PISTON DIAMETER METRIC:
    95.99 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    PISTON SIZE METRIC:
    STANDARD SIZE C
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    95.99 MM
    PRODUCT NAME:
    PISTON KIT
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.6105.A

    PROX Piston Kit 01.6105.A

    PROX

    $105.95
    Your engine's heart deserves precision engineering built to last. The PROX Piston Kit 01.6105.A delivers OEM-grade reliability with the exacting tolerances demanded by both stock rebuilds and...
    09101159
    SKU:
    09101159
    Availability:
    Ships Same Business Day
    Weight:
    0.29 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    PISTON DIAMETER METRIC:
    46.95 MM
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    46.95 MM
    PISTON SIZE METRIC:
    STANDARD SIZE A
    Qty in Cart: 0
    Quantity:
    Price:
    $105.95
    Subtotal:
  • PROX Piston Kit 01.6105.B

    PROX Piston Kit 01.6105.B

    PROX

    $105.95
    When your engine's pistons wear beyond OEM tolerances, performance and reliability suffer. The PROX Piston Kit 01.6105.B delivers factory-spec replacement pistons engineered to restore combustion...
    09101160
    SKU:
    09101160
    Availability:
    Ships Same Business Day
    Weight:
    0.29 LBS
    PISTON DIAMETER METRIC:
    46.96 MM
    PISTON SIZE METRIC:
    STANDARD SIZE B
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    46.96 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    $105.95
    Qty in Cart: 0
    Quantity:
    Price:
    $105.95
    Subtotal:
  • PROX Piston Kit 01.6105.C

    PROX Piston Kit 01.6105.C

    PROX

    $105.95
    Piston failure cuts a race or rebuild short. The PROX Piston Kit 01.6105.C delivers OEM-equivalent reliability with precision engineering, ensuring your engine maintains peak combustion efficiency...
    09101161
    SKU:
    09101161
    Availability:
    Ships Same Business Day
    Weight:
    0.29 LBS
    BORE SIZE METRIC:
    46.97 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    PISTON DIAMETER METRIC:
    46.97 MM
    PISTON SIZE METRIC:
    STANDARD SIZE C
    PRODUCT NAME:
    PISTON KIT
    $105.95
    Qty in Cart: 0
    Quantity:
    Price:
    $105.95
    Subtotal:
  • PROX Piston Kit 01.6105.D

    PROX Piston Kit 01.6105.D

    PROX

    $105.95
    Your engine's pistons are the hardest-working components under the hood, cycling thousands of times per minute while managing extreme heat and pressure. When OEM pistons wear out or fail, you need a...
    09101162
    SKU:
    09101162
    Availability:
    Ships Same Business Day
    Weight:
    0.28 LBS
    PISTON DIAMETER METRIC:
    46.98 MM
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    46.98 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    PISTON SIZE METRIC:
    STANDARD SIZE D
    Qty in Cart: 0
    Quantity:
    Price:
    $105.95
    Subtotal:
  • PROX Piston Kit 01.6343.D

    PROX Piston Kit 01.6343.D

    PROX

    $166.95
    When your engine's pistons show wear, you're looking at compromised compression, increased blow-by, and accelerated internal degradation. The PROX Piston Kit 01.6343.D delivers OEM-equivalent...
    09101166
    SKU:
    09101166
    Availability:
    Ships Same Business Day
    Weight:
    0.67 LBS
    PISTON DIAMETER METRIC:
    66.37 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    BORE SIZE METRIC:
    66.37 MM
    PISTON SIZE METRIC:
    STANDARD SIZE D
    PRODUCT NAME:
    PISTON KIT
    $166.95
    Qty in Cart: 0
    Quantity:
    Price:
    $166.95
    Subtotal:
  • PROX Piston Kit 01.6338.B

    PROX Piston Kit 01.6338.B

    PROX

    $209.99
    Whether you're rebuilding after high-mileage wear or preparing for sustained performance driving, a quality piston kit is essential to engine reliability and power delivery. The PROX Piston Kit 01...
    09101168
    SKU:
    09101168
    Availability:
    Ships Same Business Day
    Weight:
    0.51 LBS
    PISTON DIAMETER METRIC:
    75.97 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    BORE SIZE METRIC:
    75.97 MM
    PISTON SIZE METRIC:
    STANDARD SIZE B
    RIDING STYLE:
    OFF-ROAD
    Qty in Cart: 0
    Quantity:
    Price:
    $209.99
    Subtotal:
  • PROX Piston Kit 01.6338.C

    PROX Piston Kit 01.6338.C

    PROX

    $209.99
    When your pistons show wear or you're rebuilding after high-mileage racing, you need a replacement that matches or exceeds OEM performance specifications. The PROX Piston Kit 01.6338.C delivers that...
    09101169
    SKU:
    09101169
    Availability:
    Ships Same Business Day
    Weight:
    0.51 LBS
    BORE SIZE METRIC:
    75.98 MM
    PISTON DIAMETER METRIC:
    75.98 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    STANDARD SIZE C
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $209.99
    Subtotal:
  • PROX Piston Kit 01.6427.A

    PROX Piston Kit 01.6427.A

    PROX

    $195.95
    Your engine's pistons are the workhorses converting combustion into power—and when they wear, performance suffers. The PROX Piston Kit 01.6427.A delivers OEM-equivalent reliability with precision...
    09101172
    SKU:
    09101172
    Availability:
    Ships Same Business Day
    Weight:
    0.83 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    PISTON SIZE METRIC:
    STANDARD SIZE A
    PISTON DIAMETER METRIC:
    94.94 MM
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    96.94 MM
    PRODUCT NAME:
    PISTON KIT
    $195.95
    Qty in Cart: 0
    Quantity:
    Price:
    $195.95
    Subtotal:
  • PROX Piston Kit 01.6427.C

    PROX Piston Kit 01.6427.C

    PROX

    $195.95
    A piston kit is the heart of engine reliability and performance—worn or damaged pistons rob you of compression, efficiency, and power. The PROX Piston Kit 01.6427.C delivers OEM-equivalent quality...
    09101174
    SKU:
    09101174
    Availability:
    Ships Same Business Day
    Weight:
    0.83 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    STANDARD SIZE C
    BORE SIZE METRIC:
    96.96 MM
    PISTON DIAMETER METRIC:
    94.96 MM
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    PRODUCT NAME:
    PISTON KIT
    $195.95
    Qty in Cart: 0
    Quantity:
    Price:
    $195.95
    Subtotal:
  • PROX Piston Kit 01.6521.A

    PROX Piston Kit 01.6521.A

    PROX

    $214.95
    When your engine demands reliability under extreme conditions, OEM-spec pistons are non-negotiable. The PROX Piston Kit 01.6521.A delivers precision-engineered replacement pistons manufactured to...
    09101182
    SKU:
    09101182
    Availability:
    Ships Same Business Day
    Weight:
    0.91 LBS
    PISTON SIZE METRIC:
    STANDARD SIZE A
    PISTON DIAMETER METRIC:
    94.94 MM
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    94.94 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    ATV
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $214.95
    Subtotal:
  • PROX Piston Kit 01.6521.B

    PROX Piston Kit 01.6521.B

    PROX

    $221.95
    When your engine is running on stock pistons, you're leaving performance on the table and risking catastrophic failure under sustained boost or high RPM loads. The PROX Piston Kit 01.6521.B delivers...
    09101183
    SKU:
    09101183
    Availability:
    Ships Same Business Day
    Weight:
    0.91 LBS
    PISTON DIAMETER METRIC:
    94.95 MM
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    94.95 MM
    PISTON SIZE METRIC:
    STANDARD SIZE B
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    $221.95
    Qty in Cart: 0
    Quantity:
    Price:
    $221.95
    Subtotal:
  • PROX Piston Kit 01.6521.C

    PROX Piston Kit 01.6521.C

    PROX

    $221.95
    Worn or damaged pistons compromise engine efficiency, power delivery, and reliability—especially in high-demand racing and performance applications. The PROX Piston Kit 01.6521.C delivers...
    09101184
    SKU:
    09101184
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    BORE SIZE METRIC:
    94.96 MM
    PISTON DIAMETER METRIC:
    94.96 MM
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    ATV
    RIDING STYLE:
    OFF-ROAD
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    STANDARD SIZE C
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $221.95
    Subtotal:
  • PROX Piston Kit 01.1325.A

    PROX Piston Kit 01.1325.A

    PROX

    $139.95
    Factory-original performance demands factory-original components. The PROX Piston Kit 01.1325.A delivers OEM-specification reliability without compromise, engineered with precision-cast, high-silicon...
    09101187
    SKU:
    09101187
    Availability:
    Ships Same Business Day
    Weight:
    0.71 LBS
    PISTON DIAMETER METRIC:
    66.34 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    BORE SIZE METRIC:
    66.34 MM
    ENGINE TYPE:
    2-STROKE
    PISTON SIZE METRIC:
    STANDARD SIZE A
    RIDING STYLE:
    OFF-ROAD
    Qty in Cart: 0
    Quantity:
    Price:
    $139.95
    Subtotal:
  • PROX Piston Kit 01.1325.A1

    PROX Piston Kit 01.1325.A1

    PROX

    $139.95
    Worn or damaged pistons compromise engine efficiency, boost consumption, and reliability—especially under high-performance conditions. The PROX Piston Kit 01.1325.A1 restores OEM-specification...
    09101188
    SKU:
    09101188
    Availability:
    Ships Same Business Day
    Weight:
    0.71 LBS
    BORE SIZE METRIC:
    66.35 MM
    PISTON DIAMETER METRIC:
    66.35 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    ENGINE TYPE:
    2-STROKE
    PISTON SIZE METRIC:
    STANDARD SIZE A
    RIDING STYLE:
    OFF-ROAD
    Qty in Cart: 0
    Quantity:
    Price:
    $139.95
    Subtotal:
  • PROX Piston Kit 01.1496.A

    PROX Piston Kit 01.1496.A

    PROX

    $210.95
    Whether you're rebuilding after high-mileage wear or restoring a seized engine, piston failure isn't an option. The PROX Piston Kit 01.1496.A delivers OEM-equivalent reliability with the precision...
    09101191
    SKU:
    09101191
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    PISTON DIAMETER METRIC:
    95.96 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    BORE SIZE METRIC:
    95.96 MM
    ENGINE TYPE:
    4-STROKE
    RIDING STYLE:
    ATV
    PISTON SIZE METRIC:
    STANDARD SIZE A
    PRODUCT NAME:
    PISTON KIT
    $210.95
    Qty in Cart: 0
    Quantity:
    Price:
    $210.95
    Subtotal:
  • PROX Piston Kit 01.1496.B

    PROX Piston Kit 01.1496.B

    PROX

    $195.95
    When your engine demands reliability under extreme conditions, OEM-equivalent pistons are non-negotiable. The PROX Piston Kit 01.1496.B delivers factory-specification performance with Japanese...
    09101192
    SKU:
    09101192
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    PISTON DIAMETER METRIC:
    95.97 MM
    PISTON SIZE METRIC:
    STANDARD SIZE B
    BORE SIZE METRIC:
    95.97 MM
    PRODUCT NAME:
    PISTON KIT
    $195.95
    Qty in Cart: 0
    Quantity:
    Price:
    $195.95
    Subtotal:
  • PROX Piston Kit 01.1496.C

    PROX Piston Kit 01.1496.C

    PROX

    $195.95
    When your engine demands reliability that matches factory specifications, the PROX Piston Kit 01.1496.C delivers the precision engineering required for consistent performance and longevity. This...
    09101193
    SKU:
    09101193
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    PISTON SIZE METRIC:
    STANDARD SIZE C
    BORE SIZE METRIC:
    95.98 MM
    PISTON DIAMETER METRIC:
    95.98 MM
    PRODUCT NAME:
    PISTON KIT
    $195.95
    Qty in Cart: 0
    Quantity:
    Price:
    $195.95
    Subtotal:
  • PROX Piston Kit 01.2436.B

    PROX Piston Kit 01.2436.B

    PROX

    $210.95
    A piston kit is the beating heart of your engine—when tolerances drift or ring blow-by creeps in, your power delivery suffers and fuel economy tanks. The PROX Piston Kit 01.2436.B delivers...
    09101197
    SKU:
    09101197
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    BORE SIZE METRIC:
    94.96 MM
    PISTON SIZE METRIC:
    STANDARD SIZE B
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    94.96 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $210.95
    Subtotal:
  • PROX Piston Kit 01.2487.000

    PROX Piston Kit 01.2487.000

    PROX

    $121.95
    Worn or damaged pistons compromise combustion efficiency, power delivery, and engine longevity. The PROX Piston Kit 01.2487.000 restores your engine to OEM performance specifications with...
    09101198
    SKU:
    09101198
    Availability:
    Ships Same Business Day
    Weight:
    0.98 LBS
    BORE SIZE METRIC:
    83.00 MM
    PISTON DIAMETER METRIC:
    83.00 MM
    PRODUCT NAME:
    PISTON KIT
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    STANDARD
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $121.95
    Subtotal:
  • PROX Piston Kit 01.2487.050

    PROX Piston Kit 01.2487.050

    PROX

    $121.95
    A piston kit is the foundation of reliable engine performance, and worn or damaged pistons directly compromise compression, power delivery, and engine longevity. The PROX Piston Kit 01.2487.050...
    09101199
    SKU:
    09101199
    Availability:
    Ships Same Business Day
    Weight:
    1.00 LBS
    BORE SIZE METRIC:
    83.50 MM
    PISTON DIAMETER METRIC:
    83.50 MM
    PRODUCT NAME:
    PISTON KIT
    ENGINE TYPE:
    4-STROKE
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    +0.50 MM
    $121.95
    Qty in Cart: 0
    Quantity:
    Price:
    $121.95
    Subtotal:
  • PROX Piston Kit 01.2706.A

    PROX Piston Kit 01.2706.A

    PROX

    $149.95
    A piston kit is one of the most critical internal engine components you'll rebuild or replace, and choosing the right one directly impacts engine reliability, efficiency, and longevity. The PROX...
    09101201
    SKU:
    09101201
    Availability:
    Ships Same Business Day
    Weight:
    1.19 LBS
    PISTON SIZE METRIC:
    STANDARD SIZE A
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    101.94 MM
    RIDING STYLE:
    UTV
    ENGINE TYPE:
    4-STROKE
    RIDING STYLE:
    ATV
    PISTON DIAMETER METRIC:
    101.94 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • Total: items /

Adding your products to cart

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

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