Harley Piston and Ring Kits
Harley Bike Piston & Ring Kits at JJ Motorsports
Rebuild your Harley's top end with premium piston and ring kits from JJ Motorsports, featuring forged aluminum pistons with high-performance rings for increased compression and durability on Big Twin, Evo, Twin Cam, and Sportster engines. These kits deliver reliable power and long-lasting performance.
Shop KB Performance, Wiseco, and Revolution Performance piston kits for race-proven quality. Explore related categories such as Harley engine for gaskets and rebuilds, or Harley for cams and heads to complete your top-end refresh.
Top Harley Piston & Ring Kits
- KB Performance Super Duty Piston KB660LCA-STD – Forged super-duty piston with rings for 660cc; ideal for high-compression Evo builds.
- Wiseco Piston Kit with Gasket VM Ring VT2719 – Complete Wiseco kit for Twin Cam; includes rings and gaskets for reliable top-end power.
- Revolution Performance LLC Piston Kit RP301-601W – 601cc piston kit with wrist pin; forged for Sportster performance upgrades.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Wiseco Piston Kit 114ci 2017-2021 Harley-Davidson K2785
WISECO
$576.95Experience unparalleled performance with the WISECO Piston Kit M8 K2785, designed for extreme conditions and optimized for maximum efficiency. This kit combines advanced materials and innovative design to enhance power, reduce wear, and ensure a smooth...09031552- SKU:
- 09031552
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- BORE SIZE IMPERIAL:
- 4.080'
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.143'
- DISPLACEMENT:
- 1875 CC
- PISTON MATERIAL:
- ARMORX™
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- ARMORFIT™
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- BORE - OVERSIZE:
- +0,143'
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
$576.95 -
Wiseco Piston Kit 117ci 11:1 Compression for Harley-Davidson FLHTKL 2017-2019 K2799
WISECO
$576.95Experience unparalleled performance with the WISECO Piston Kit M8 K2799, engineered for motorcycle enthusiasts seeking enhanced power and efficiency. This advanced kit features innovative coatings and designs that optimize engine function while ensuring...09031553- SKU:
- 09031553
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- BORE - OVERSIZE:
- +0,190'
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON MATERIAL:
- ARMORX™
- UNITS:
- KIT
- PISTON HEAD SHAPE:
- FLAT TOP
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORFIT™
- BORE OVERSIZE - IMPERIAL:
- +0.190'
- BORE SIZE IMPERIAL:
- 4.125'
- DISPLACEMENT:
- 1918 CC
$576.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-116W
REVOLUTION PERFORMANCE, LLC
$495.95Top-quality custom-forged piston kits manufactured with high-strength aluminum alloy, Include pistons with skirt coating, rings, chrome piston pins and retainer clips, High-tech manufacturing ensures greater operating strength and lower expansion at high...09106372- SKU:
- 09106372
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 107'
- BORE SIZE IMPERIAL:
- 3.937'
- PISTON HEAD SHAPE:
- FLAT TOP
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COMPRESSION RATIO IMPERIAL:
- 10.1:1
- UNITS:
- KIT
$495.95Qty in Cart: 0Quantity:Price:$495.95Subtotal: -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-120W
REVOLUTION PERFORMANCE, LLC
$495.95Top-quality custom-forged piston kits manufactured with high-strength aluminum alloy, Include pistons with skirt coating, rings, chrome piston pins and retainer clips, High-tech manufacturing ensures greater operating strength and lower expansion at high...09106374- SKU:
- 09106374
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.6:1
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 4.060'
- DISPLACEMENT:
- 113'
- PISTON HEAD SHAPE:
- DOMED
- UNITS:
- KIT
$495.95Qty in Cart: 0Quantity:Price:$495.95Subtotal: -
Wiseco Piston Kit XL 1200 1996-2003 K1688
WISECO
$409.95Enhance your motorcycle's performance with the WISECO Piston Kit XL 1200 .030 K1688, designed for durability and efficiency. Crafted from high-silicon aluminum alloy, this kit ensures reliable strength for your top-end rebuild or overbore project,...09030148- SKU:
- 09030148
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- BORE - OVERSIZE:
- +0,030'
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- DISPLACEMENT:
- 1200 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- UNITS:
- EACH
- BORE SIZE IMPERIAL:
- 3.498'
- PISTON MATERIAL:
- FORGED
$409.95 -
Wiseco 1988-2003 Harley-Davidson Sportster 1200 XLH Piston Kit K1685
WISECO
$447.95Upgrade your engine's performance with the WISECO Piston Kit 1200 XL K1685, crafted from high-silicon aluminum alloy to ensure exceptional strength and reliability. This comprehensive kit includes everything you need for an effective overbore or top-end...K1685- SKU:
- K1685
- Availability:
- Ships Same Business Day
- Weight:
- 2.31 LBS
- DISPLACEMENT:
- 1200 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- BORE SIZE IMPERIAL:
- 3.498'
- TYPE:
- TOP END
- UNITS:
- EACH
$447.95 -
Wiseco Piston Kit 1984-1999 Harley-Davidson FLHRI Road King Classic K1665
WISECO
$447.95Upgrade your motorcycle's performance with the WISECO Big Twin Piston Kit K1665, expertly crafted from high-silicon aluminum alloy for exceptional strength and reliability. This comprehensive kit includes everything you need for an efficient overbore or...K1665- SKU:
- K1665
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- TYPE:
- TOP END
- UNITS:
- EACH
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 1340 CC
$447.95 -
Wiseco Piston Kit 1978-1984 Harley-Davidson Electra Glide FLH High Compression K1627
WISECO
$422.95Upgrade your motorcycle's performance with the WISECO High Compression Piston Kit, specifically designed for 1978-1984 Big Twin models. Crafted from a high-silicon aluminum alloy, this kit ensures exceptional strength and durability for your engine...K1627- SKU:
- K1627
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- BORE - OVERSIZE:
- +0,040'
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- DISPLACEMENT:
- 1367 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.040'
- BORE SIZE IMPERIAL:
- 3.537'
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- TYPE:
- TOP END
- UNITS:
- EACH
$422.95 -
Wiseco Piston Kit for 1986-2003 Kawasaki ZG1200 Voyager 1196cc K1662
WISECO
$447.95Upgrade your engine's performance with the WISECO Forged Piston Kit, designed for superior strength and reliability. This comprehensive kit includes everything you need for a successful top-end rebuild, ensuring optimal power and efficiency. Perfect for...K1662- SKU:
- K1662
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- BORE - OVERSIZE:
- +0,020'
- PISTON MATERIAL:
- ALUMINUM
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.498'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- UNITS:
- EACH
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- DISPLACEMENT:
- 1200 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
$447.95Qty in Cart: 0Quantity:Price:$447.95Subtotal: -
Wiseco Piston Kit 1995-2003 Harley-Davidson XL1200 3.498" Bore .010" Over K1686
WISECO
$447.95Experience unmatched performance with the WISECO Piston Kit XL 1200 .010 K1686, expertly crafted from high-silicon aluminum alloy for exceptional strength and durability. This comprehensive kit includes everything you need for an effective top-end...09030147- SKU:
- 09030147
- Availability:
- Ships Same Business Day
- Weight:
- 2.34 LBS
- DISPLACEMENT:
- 1200 CC
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- BORE - OVERSIZE:
- +0,010'
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PISTON MATERIAL:
- ALUMINUM
- PISTON MATERIAL:
- FORGED
- UNITS:
- EACH
- BORE SIZE IMPERIAL:
- 3.508'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
$447.95 -
Wiseco Piston Kit with Gasket for 1999-2006 Harley-Davidson Road King FLHR VT2711
WISECO
$659.95Experience unparalleled performance and reliability with the WISECO Piston Kit, expertly crafted from high-silicon aluminum alloy. This comprehensive kit includes everything you need for a successful top-end rebuild or overbore, ensuring your engine runs...09030789- SKU:
- 09030789
- Availability:
- Ships Same Business Day
- Weight:
- 4.12 LBS
- BORE - OVERSIZE:
- +0,010'
- TYPE:
- TOP END
- UNITS:
- EACH
- DISPLACEMENT:
- 1554 CC
- PISTON MATERIAL:
- ALUMINUM
- PISTON MATERIAL:
- FORGED
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PRODUCT NAME:
- REBUILD KIT
$659.95Qty in Cart: 0Quantity:Price:$659.95Subtotal: -
Wiseco Piston Kit 2004-2017 Harley-Davidson XL1200 0.020" K1748
WISECO
$424.95Engineered for peak performance, the WISECO Piston Kit is crafted from a high-silicon aluminum alloy, ensuring exceptional durability and reliability. This comprehensive kit includes everything you need for a successful top-end rebuild or overbore,...09030585- SKU:
- 09030585
- Availability:
- Ships Same Business Day
- Weight:
- 2.24 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- DISPLACEMENT:
- 1200 CC
- BORE - OVERSIZE:
- +0,020'
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PRODUCT NAME:
- REBUILD KIT
- BORE SIZE IMPERIAL:
- 3.498'
- TYPE:
- TOP END
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 3-13/16'
$424.95Qty in Cart: 0Quantity:Price:$424.95Subtotal: -
Wiseco Piston Kit 1972-1985 Harley-Davidson Sportster XLH K1604
WISECO
$344.95Upgrade your motorcycle's performance with the WISECO Piston Kit, expertly crafted from high-silicon aluminum alloy for enhanced strength and reliability. This complete kit includes everything you need for overboring or rebuilding your top end, ensuring...K1604- SKU:
- K1604
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- TYPE:
- TOP END
- UNITS:
- EACH
- BORE OVERSIZE - IMPERIAL:
- +0.040'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 1022 CC
- STROKE LENGTH IMPERIAL:
- 3-13/16'
- BORE - OVERSIZE:
- +0,040'
- BORE SIZE IMPERIAL:
- 3.228'
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
$344.95 -
Wiseco Piston Kit 1948-1964 Harley-Davidson FLHFB Electra Glide K1606
WISECO
$378.95Upgrade your motorcycle's performance with the WISECO Piston Kit, designed for Big Twin models from 1948 to 1980. Crafted from high-silicon aluminum alloy, this kit ensures exceptional strength and reliability while providing all essential components for...K1606- SKU:
- K1606
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- DISPLACEMENT:
- 1213 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- +0,010'
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- BORE SIZE IMPERIAL:
- 3.447'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- RIDING STYLE:
- STREET
$378.95 -
Wiseco Piston Kit 1978-1984 Harley-Davidson FLH K1615
WISECO
$384.95Upgrade your engine's performance with the WISECO Piston Kit, meticulously crafted from high-silicon aluminum alloy to ensure exceptional strength and reliability. This complete kit includes everything you need for a successful overbore or top-end...K1615- SKU:
- K1615
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- BORE - OVERSIZE:
- +0,020'
- DISPLACEMENT:
- 1353 CC
- COMPRESSION RATIO IMPERIAL:
- 7.0:1
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- TYPE:
- TOP END
- UNITS:
- EACH
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PISTON MATERIAL:
- FORGED
- BORE SIZE IMPERIAL:
- 3.518'
$384.95 -
On Sale
S&S CYCLE Piston Kit 106-0434
S&S CYCLE
MSRP: $467.95Now: $421.16Was: $467.95Increase the displacement of 883cc and 1200cc engines to 1250cc at 10.3:1 compression, Cast Flat-Topped Replacement Piston Kits For 1984-'99 HD® Big Twins with Stock Heads or S&S Performance Replacement Heads, May be used with stock 1200cc cylinder...09105022- SKU:
- 09105022
- Availability:
- Ships Same Business Day
- Weight:
- 2.45 LBS
- DISPLACEMENT:
- 103'
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- +0,010'
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.875'
- PISTON HEAD SHAPE:
- FLAT TOP
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- TYPE:
- REPLACEMENT
MSRP: $467.95Now: $421.16Was: $467.95Qty in Cart: 0Quantity:Price:MSRP: $467.95Now: $421.16Was: $467.95Subtotal: -
On Sale
S&S CYCLE Piston Kit 106-5498
S&S CYCLE
MSRP: $479.95Now: $431.96Was: $479.95Forged pistons for superior strength, Modern alloys and piston skirt profiles for low noise and long engine life, Piston kits include set of pistons, rings, wristpins, and clips09101921- SKU:
- 09101921
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 8.0:1
- DISPLACEMENT:
- 74'
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.4675'
- TYPE:
- LOW COMPRESSION
- BORE - OVERSIZE:
- +0,030'
- BORE OVERSIZE - IMPERIAL:
- +0.030'
MSRP: $479.95Now: $431.96Was: $479.95Qty in Cart: 0Quantity:Price:MSRP: $479.95Now: $431.96Was: $479.95Subtotal: -
On Sale
S&S CYCLE Piston Kit 106-5506
S&S CYCLE
MSRP: $469.95Now: $422.96Was: $469.95Forged pistons for superior strength, Modern alloys and piston skirt profiles for low noise and long engine life, Piston kits include set of pistons, rings, wristpins, and clips09101930- SKU:
- 09101930
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- BORE - OVERSIZE:
- +0,030'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.4675'
- DISPLACEMENT:
- 74'
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- TYPE:
- HIGH COMPRESSION
MSRP: $469.95Now: $422.96Was: $469.95Qty in Cart: 0Quantity:Price:MSRP: $469.95Now: $422.96Was: $469.95Subtotal: -
On Sale
Wiseco Piston Kit 121" 4.135" Bore 2017-2021 Harley-Davidson FLHR K2806
WISECO
MSRP: $576.95Now: $446.00Was: $576.95Elevate your engine's performance with the WISECO M8 121" Piston Kit, designed for optimal efficiency and power. Featuring advanced coating technologies and a high compression ratio, this piston kit ensures superior durability and enhanced combustion for...09031680- SKU:
- 09031680
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORFIT™
- DISPLACEMENT:
- 121'
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- UNITS:
- KIT
- PISTON MATERIAL:
- ARMORX™
- BORE SIZE IMPERIAL:
- 4.135'
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
MSRP: $576.95Now: $446.00Was: $576.95 -
On Sale
Wiseco Piston Kit 107ci 11:1 Compression for Harley-Davidson 2017-2021 K2784
WISECO
MSRP: $524.95Now: $446.00Was: $524.95Experience unparalleled performance with the WISECO Piston Kit M8 K2784, designed for riders who demand the best. Featuring advanced coatings and a high compression ratio, this piston kit enhances engine efficiency and power output, ensuring a smooth and...09031551- SKU:
- 09031551
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- BORE - OVERSIZE:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.937'
- DISPLACEMENT:
- 1746 CC
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- ARMORFIT™
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PISTON HEAD SHAPE:
- DOMED
- PISTON MATERIAL:
- ARMORX™
MSRP: $524.95Now: $446.00Was: $524.95Qty in Cart: 0Quantity:Price:MSRP: $524.95Now: $446.00Was: $524.95Subtotal:
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Piston and Ring Kits
- Compatibility: Match kits to your Harley's engine type (e.g., Big Twin, Twin Cam, Sportster, M8) and model (e.g., FLHR Road King 1984-1998, XLH1200 Sportster 1988-2003, FLST Heritage Softail 2006). Use the vehicle selector for year-specific fits, including bore oversizes (+0.005" to +0.188") and displacements (1200cc-1353cc) to ensure precise rebuilds without modifications.
- Type of Use: For high-performance or street builds, select forged kits with high compression (10.0:1-11.1:1) for power gains; standard rebuilds benefit from super-duty options with skirt coatings for quiet operation and durability in touring or daily riding.
- Components and Upgrades: Choose kits including pistons, rings, pins, clips, and sometimes gaskets; upgrade to ArmorGlide/ArmorFit coatings for reduced friction and zero clearance install. Focus on high-silicon aluminum alloys for strength and reliability.
- Brand and Quality: Opt for Wiseco for forged aluminum kits with advanced coatings and high compression, or KB Performance for super-duty pistons with skirt technology. Prioritize OEM-matching quality for long-lasting performance and precise fits.
- Installation and Cost: Kits are designed for DIY or professional top-end rebuilds with basic tools; prices range from $307 for standard kits to $659 for premium options with gaskets—factor in expert support and free shipping over $99 for value.
Frequently Asked Questions (FAQs)
- What Harley models and engines do these piston and ring kits support? Kits are compatible with Big Twin (e.g., Road King 1984-1998), Sportster (e.g., XLH1200 1988-2003), Twin Cam (e.g., Heritage Softail 2006), and M8 (e.g., Street Glide ST 2022-2023)—use the year/make/model filter for exact matches.
- How do forged pistons improve engine performance? Forged aluminum pistons (e.g., Wiseco) with high-silicon alloys and coatings reduce friction, enhance strength, and support higher compression for better power and efficiency in rebuilds.
- What is typically included in a kit? Most kits include pistons, rings, pins, spiral-lock clips, and sometimes gaskets (e.g., Wiseco VT2719); check details for oversize options and top-end components.
- Are these kits suitable for oversize bores? Yes, available in standard to +0.188" oversizes for bored engines, with compression ratios from 9.0:1 to 11.1:1 for custom builds.
- What if a kit doesn't fit my Harley? Verify bore size, displacement, and model before buying. Our returns policy allows exchanges or refunds if it doesn't match.
- Can I find related engine parts? Yes—explore gaskets, cylinders/heads, bearings/seals, or full rebuild kits in the Harley engine category to complete your top-end refresh.
