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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 Intake Valve 28.1323-2

    PROX Intake Valve 28.1323-2

    PROX

    $19.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260671
    SKU:
    09260671
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    RIDING STYLE:
    OFF-ROAD
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    PRODUCT NAME:
    VALVE
    UNITS:
    EACH
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • PROX Exhaust Valve 28.1338-1

    PROX Exhaust Valve 28.1338-1

    PROX

    $39.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260672
    SKU:
    09260672
    Availability:
    Ships Same Business Day
    Weight:
    0.07 LBS
    MATERIAL:
    STEEL
    PRODUCT NAME:
    VALVE
    UNITS:
    EACH
    APPLICATION:
    EXHAUST
    RIDING STYLE:
    OFF-ROAD
    $39.95
    Qty in Cart: 0
    Quantity:
    Price:
    $39.95
    Subtotal:
  • PROX Exhaust Valve 28.1381-1

    PROX Exhaust Valve 28.1381-1

    PROX

    $29.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260675
    SKU:
    09260675
    Availability:
    Ships Same Business Day
    Weight:
    0.08 LBS
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    PRODUCT NAME:
    VALVE
    APPLICATION:
    EXHAUST
    $29.95
    Qty in Cart: 0
    Quantity:
    Price:
    $29.95
    Subtotal:
  • PROX Intake Valve 28.1381-2

    PROX Intake Valve 28.1381-2

    PROX

    $19.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260676
    SKU:
    09260676
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    APPLICATION:
    INTAKE
    UNITS:
    EACH
    MATERIAL:
    STEEL
    PRODUCT NAME:
    VALVE
    RIDING STYLE:
    OFF-ROAD
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • PROX Exhaust Valve 28.2200-1

    PROX Exhaust Valve 28.2200-1

    PROX

    $24.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260678
    SKU:
    09260678
    Availability:
    Ships Same Business Day
    Weight:
    0.06 LBS
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    VALVE
    UNITS:
    EACH
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    $24.95
    Qty in Cart: 0
    Quantity:
    Price:
    $24.95
    Subtotal:
  • PROX Intake Valve 28.2200-2

    PROX Intake Valve 28.2200-2

    PROX

    $14.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260679
    SKU:
    09260679
    Availability:
    Ships Same Business Day
    Weight:
    0.06 LBS
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    PRODUCT NAME:
    VALVE
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    $14.95
    Qty in Cart: 0
    Quantity:
    Price:
    $14.95
    Subtotal:
  • PROX Exhaust Valve 28.2487-1

    PROX Exhaust Valve 28.2487-1

    PROX

    $44.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260680
    SKU:
    09260680
    Availability:
    Ships Same Business Day
    Weight:
    0.16 LBS
    MATERIAL:
    STEEL
    PRODUCT NAME:
    VALVE
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    APPLICATION:
    EXHAUST
    $44.95
    Qty in Cart: 0
    Quantity:
    Price:
    $44.95
    Subtotal:
  • PROX Intake Valve 28.2487-2

    PROX Intake Valve 28.2487-2

    PROX

    $29.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260681
    SKU:
    09260681
    Availability:
    Ships Same Business Day
    Weight:
    0.17 LBS
    RIDING STYLE:
    ATV
    MATERIAL:
    STEEL
    APPLICATION:
    INTAKE
    PRODUCT NAME:
    VALVE
    UNITS:
    EACH
    $29.95
    Qty in Cart: 0
    Quantity:
    Price:
    $29.95
    Subtotal:
  • PROX Intake Valve 28.2661-2

    PROX Intake Valve 28.2661-2

    PROX

    $29.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260685
    SKU:
    09260685
    Availability:
    Ships Same Business Day
    Weight:
    0.11 LBS
    PRODUCT NAME:
    VALVE
    APPLICATION:
    INTAKE
    UNITS:
    EACH
    MATERIAL:
    STEEL
    RIDING STYLE:
    ATV
    $29.95
    Qty in Cart: 0
    Quantity:
    Price:
    $29.95
    Subtotal:
  • PROX Exhaust Valve 28.2706-1

    PROX Exhaust Valve 28.2706-1

    PROX

    $39.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260686
    SKU:
    09260686
    Availability:
    Ships Same Business Day
    Weight:
    0.12 LBS
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    VALVE
    MATERIAL:
    STEEL
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    $39.95
    Qty in Cart: 0
    Quantity:
    Price:
    $39.95
    Subtotal:
  • PROX Intake Valve 28.2706-2

    PROX Intake Valve 28.2706-2

    PROX

    $24.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260687
    SKU:
    09260687
    Availability:
    Ships Same Business Day
    Weight:
    0.14 LBS
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    PRODUCT NAME:
    VALVE
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    $24.95
    Qty in Cart: 0
    Quantity:
    Price:
    $24.95
    Subtotal:
  • PROX Intake Valve 28.6520-2

    PROX Intake Valve 28.6520-2

    PROX

    $34.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260689
    SKU:
    09260689
    Availability:
    Ships Same Business Day
    Weight:
    0.12 LBS
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    PRODUCT NAME:
    VALVE
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    $34.95
    Qty in Cart: 0
    Quantity:
    Price:
    $34.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SES2402-1

    PROX Valve and Spring Kit 28.SES2402-1

    PROX

    $149.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261455
    SKU:
    09261455
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    PRODUCT NAME:
    SPRING KIT
    APPLICATION:
    EXHAUST
    TYPE:
    VALVE
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SES3338-1

    PROX Valve and Spring Kit 28.SES3338-1

    PROX

    $149.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261456
    SKU:
    09261456
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    UNITS:
    KIT
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    SPRING KIT
    TYPE:
    VALVE
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS1336-2

    PROX Valve and Spring Kit 28.SIS1336-2

    PROX

    $149.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261458
    SKU:
    09261458
    Availability:
    Ships Same Business Day
    Weight:
    0.29 LBS
    PRODUCT NAME:
    SPRING KIT
    TYPE:
    VALVE
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS1337-2

    PROX Valve and Spring Kit 28.SIS1337-2

    PROX

    $149.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261459
    SKU:
    09261459
    Availability:
    Ships Same Business Day
    Weight:
    0.29 LBS
    PRODUCT NAME:
    SPRING KIT
    TYPE:
    VALVE
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    APPLICATION:
    INTAKE
    UNITS:
    KIT
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS4335-2

    PROX Valve and Spring Kit 28.SIS4335-2

    PROX

    $149.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261462
    SKU:
    09261462
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    TYPE:
    VALVE
    MATERIAL:
    STEEL
    APPLICATION:
    INTAKE
    PRODUCT NAME:
    SPRING KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS4336-2 PROX Valve and Spring Kit 28.SIS4336-2

    PROX Valve and Spring Kit 28.SIS4336-2

    PROX

    $149.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261463
    SKU:
    09261463
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    PRODUCT NAME:
    SPRING KIT
    TYPE:
    VALVE
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS4338-2

    PROX Valve and Spring Kit 28.SIS4338-2

    PROX

    $149.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261464
    SKU:
    09261464
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    TYPE:
    VALVE
    PRODUCT NAME:
    SPRING KIT
    UNITS:
    KIT
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Exhaust Valve 28.1340-1

    PROX Exhaust Valve 28.1340-1

    PROX

    $44.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09261419
    SKU:
    09261419
    Availability:
    Ships Same Business Day
    Weight:
    0.07 LBS
    MATERIAL:
    STEEL
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    VALVE
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    $44.95
    Qty in Cart: 0
    Quantity:
    Price:
    $44.95
    Subtotal:
  • PROX Exhaust Valve 28.1409-1

    PROX Exhaust Valve 28.1409-1

    PROX

    $44.95
    Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09261421
    SKU:
    09261421
    Availability:
    Ships Same Business Day
    Weight:
    0.09 LBS
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    VALVE
    UNITS:
    EACH
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    $44.95
    Qty in Cart: 0
    Quantity:
    Price:
    $44.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SES2440-1

    PROX Valve and Spring Kit 28.SES2440-1

    PROX

    $139.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261427
    SKU:
    09261427
    Availability:
    Ships Same Business Day
    Weight:
    0.24 LBS
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    SPRING KIT
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    TYPE:
    VALVE
    $139.95
    Qty in Cart: 0
    Quantity:
    Price:
    $139.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SES6329-1

    PROX Valve and Spring Kit 28.SES6329-1

    PROX

    $149.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261430
    SKU:
    09261430
    Availability:
    Ships Same Business Day
    Weight:
    0.24 LBS
    APPLICATION:
    EXHAUST
    TYPE:
    VALVE
    PRODUCT NAME:
    SPRING KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    MATERIAL:
    STEEL
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS1409-2

    PROX Valve and Spring Kit 28.SIS1409-2

    PROX

    $139.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261431
    SKU:
    09261431
    Availability:
    Ships Same Business Day
    Weight:
    0.31 LBS
    APPLICATION:
    INTAKE
    PRODUCT NAME:
    SPRING KIT
    TYPE:
    VALVE
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    $139.95
    Qty in Cart: 0
    Quantity:
    Price:
    $139.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS2440-2

    PROX Valve and Spring Kit 28.SIS2440-2

    PROX

    $139.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261432
    SKU:
    09261432
    Availability:
    Ships Same Business Day
    Weight:
    0.34 LBS
    PRODUCT NAME:
    SPRING KIT
    TYPE:
    VALVE
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    APPLICATION:
    INTAKE
    $139.95
    Qty in Cart: 0
    Quantity:
    Price:
    $139.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS3406-2

    PROX Valve and Spring Kit 28.SIS3406-2

    PROX

    $139.95
    Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel...
    09261433
    SKU:
    09261433
    Availability:
    Ships Same Business Day
    Weight:
    0.29 LBS
    PRODUCT NAME:
    SPRING KIT
    RIDING STYLE:
    ATV
    TYPE:
    VALVE
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    UNITS:
    KIT
    $139.95
    Qty in Cart: 0
    Quantity:
    Price:
    $139.95
    Subtotal:
  • PROX Piston Kit 01.1113.B

    PROX Piston Kit 01.1113.B

    PROX

    $89.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09100020
    SKU:
    09100020
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    47.45 MM
    ENGINE TYPE:
    2-STROKE
    PISTON SIZE METRIC:
    STANDARD SIZE B
    PISTON DIAMETER METRIC:
    47.45 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    $89.95
    Qty in Cart: 0
    Quantity:
    Price:
    $89.95
    Subtotal:
  • PROX Piston Kit 01.1113.C

    PROX Piston Kit 01.1113.C

    PROX

    $89.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09100021
    SKU:
    09100021
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    PISTON DIAMETER METRIC:
    47.46 MM
    PISTON SIZE METRIC:
    STANDARD SIZE C
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    47.46 MM
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    PRODUCT NAME:
    PISTON KIT
    $89.95
    Qty in Cart: 0
    Quantity:
    Price:
    $89.95
    Subtotal:
  • PROX Piston Kit 01.4022.A

    PROX Piston Kit 01.4022.A

    PROX

    $79.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09100022
    SKU:
    09100022
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE SIZE METRIC:
    44.45 MM
    PISTON DIAMETER METRIC:
    42.96 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    PISTON SIZE METRIC:
    STANDARD SIZE A
    RIDING STYLE:
    OFF-ROAD
    $79.95
    Qty in Cart: 0
    Quantity:
    Price:
    $79.95
    Subtotal:
  • PROX Piston Kit 01.4022.B

    PROX Piston Kit 01.4022.B

    PROX

    $79.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09100023
    SKU:
    09100023
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE SIZE METRIC:
    44.46 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    PISTON DIAMETER METRIC:
    44.46 MM
    PISTON SIZE METRIC:
    STANDARD SIZE B
    RIDING STYLE:
    OFF-ROAD
    $79.95
    Qty in Cart: 0
    Quantity:
    Price:
    $79.95
    Subtotal:
  • PROX Piston Kit 01.4223.B

    PROX Piston Kit 01.4223.B

    PROX

    $105.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09100025
    SKU:
    09100025
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON DIAMETER METRIC:
    53.96 MM
    RIDING STYLE:
    OFF-ROAD
    ENGINE TYPE:
    2-STROKE
    PISTON SIZE METRIC:
    STANDARD SIZE B
    UNITS:
    EACH
    BORE SIZE METRIC:
    53.96 MM
    PRODUCT NAME:
    PISTON KIT
    $105.95
    Qty in Cart: 0
    Quantity:
    Price:
    $105.95
    Subtotal:
  • PROX Piston Kit 01.4223.C

    PROX Piston Kit 01.4223.C

    PROX

    $101.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09100026
    SKU:
    09100026
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE SIZE METRIC:
    53.97 MM
    PISTON SIZE METRIC:
    STANDARD SIZE C
    ENGINE TYPE:
    2-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    PISTON DIAMETER METRIC:
    53.97 MM
    RIDING STYLE:
    OFF-ROAD
    PRODUCT NAME:
    PISTON KIT
    $101.95
    Qty in Cart: 0
    Quantity:
    Price:
    $101.95
    Subtotal:
  • PROX Piston Kit 01.2406.A

    PROX Piston Kit 01.2406.A

    PROX

    $179.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09100027
    SKU:
    09100027
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    PISTON DIAMETER METRIC:
    76.95 MM
    BORE SIZE METRIC:
    76.95 MM
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    PISTON SIZE METRIC:
    STANDARD SIZE A
    RIDING STYLE:
    OFF-ROAD
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.2406.B

    PROX Piston Kit 01.2406.B

    PROX

    $179.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09100028
    SKU:
    09100028
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE SIZE METRIC:
    76.96 MM
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    76.96 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    PISTON SIZE METRIC:
    STANDARD SIZE B
    RIDING STYLE:
    OFF-ROAD
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.2427.A

    PROX Piston Kit 01.2427.A

    PROX

    $185.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09100031
    SKU:
    09100031
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE SIZE METRIC:
    94.95 MM
    PISTON SIZE METRIC:
    STANDARD SIZE A
    RIDING STYLE:
    OFF-ROAD
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    94.95 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    $185.95
    Qty in Cart: 0
    Quantity:
    Price:
    $185.95
    Subtotal:
  • PROX Engine Rebuild Kit 10.EK5806.A

    PROX Engine Rebuild Kit 10.EK5806.A

    PROX

    $1,099.95
    PROX Engine Rebuild Kit
    09031687
    SKU:
    09031687
    Availability:
    Ships Same Business Day
    Weight:
    25.51 LBS
    PRODUCT NAME:
    REBUILD KIT
    TYPE:
    ENGINE
    RIDING STYLE:
    UTV
    BORE SIZE METRIC:
    STANDARD
    RIDING STYLE:
    ATV
    UNITS:
    KIT
    $1,099.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,099.95
    Subtotal:
  • On Sale
    PROX Engine Rebuild Kit 10.EK5806.B

    PROX Engine Rebuild Kit 10.EK5806.B

    PROX

    MSRP: $1,099.95
    Now: $732.00
    Was: $1,099.95
    PROX Engine Rebuild Kit
    09031688
    SKU:
    09031688
    Availability:
    Ships Same Business Day
    Weight:
    25.56 LBS
    RIDING STYLE:
    UTV
    BORE SIZE METRIC:
    +0.01 MM
    UNITS:
    KIT
    PRODUCT NAME:
    REBUILD KIT
    TYPE:
    ENGINE
    RIDING STYLE:
    ATV
    MSRP: $1,099.95
    Now: $732.00
    Was: $1,099.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $1,099.95
    Now: $732.00
    Was: $1,099.95
    Subtotal:
  • PROX Engine Rebuild Kit 10.EK5806.A1

    PROX Engine Rebuild Kit 10.EK5806.A1

    PROX

    $1,099.95
    PROX Engine Rebuild Kit
    09031690
    SKU:
    09031690
    Availability:
    Ships Same Business Day
    Weight:
    26.61 LBS
    BORE SIZE METRIC:
    STANDARD
    RIDING STYLE:
    UTV
    RIDING STYLE:
    ATV
    TYPE:
    ENGINE
    UNITS:
    KIT
    PRODUCT NAME:
    REBUILD KIT
    $1,099.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,099.95
    Subtotal:
  • PROX Engine Rebuild Kit 10.EK5805.A1

    PROX Engine Rebuild Kit 10.EK5805.A1

    PROX

    $1,099.95
    PROX Engine Rebuild Kit
    09031696
    SKU:
    09031696
    Availability:
    Ships Same Business Day
    Weight:
    25.61 LBS
    UNITS:
    KIT
    PRODUCT NAME:
    REBUILD KIT
    TYPE:
    ENGINE
    BORE SIZE METRIC:
    STANDARD
    RIDING STYLE:
    UTV
    $1,099.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,099.95
    Subtotal:
  • PROX Piston Kit 01.4409.A

    PROX Piston Kit 01.4409.A

    PROX

    $189.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09101465
    SKU:
    09101465
    Availability:
    Ships Same Business Day
    Weight:
    0.82 LBS
    RIDING STYLE:
    OFF-ROAD
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    BORE SIZE METRIC:
    95.97 MM
    PISTON SIZE METRIC:
    STANDARD SIZE A
    PISTON DIAMETER METRIC:
    95.97 MM
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    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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