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
-
REVOLUTION PERFORMANCE, LLC Piston Kit - 85" - Evolution RP301-207W
REVOLUTION PERFORMANCE, LLC
$495.95If you've already committed to a big bore kit, the right piston set is non-negotiable for reliability and peak power delivery. Revolution Performance's 85" piston kit is engineered to maximize ring seal and heat dissipation in your Evolution engine,...09106384- SKU:
- 09106384
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- DISPLACEMENT:
- 85'
- PISTON HEAD SHAPE:
- FLAT TOP
- BORE SIZE IMPERIAL:
- 3-9/16'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- STYLE:
- BIG BORE
- UNITS:
- KIT
$495.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit - 85" - Evolution RP301-208W
REVOLUTION PERFORMANCE, LLC
$495.95If you're running a big bore kit on your Evolution engine, this piston kit is essential maintenance or an upgrade path for maximum displacement and power. REVOLUTION PERFORMANCE's 85" pistons are precision-engineered to handle the increased cylinder...09106385- SKU:
- 09106385
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- DISPLACEMENT:
- 85'
- PRODUCT NAME:
- PISTON KIT
- PISTON HEAD SHAPE:
- DOMED
- STYLE:
- BIG BORE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3-9/16'
- RIDING STYLE:
- STREET
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
- STROKE LENGTH IMPERIAL:
- 4-1/4'
$495.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit - 92" - Evolution RP301-413W
REVOLUTION PERFORMANCE, LLC
$481.95When you've committed to a big bore kit, your original pistons simply can't handle the displacement increase and power demands. This Revolution Performance piston kit delivers the strength and precision engineering required to safely maximize your 92"...09106386- SKU:
- 09106386
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- BORE SIZE IMPERIAL:
- 3-9/16'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 92'
- PISTON HEAD SHAPE:
- FLAT TOP
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- STYLE:
- BIG BORE
- COMPRESSION RATIO IMPERIAL:
- 10.3:1
- UNITS:
- KIT
$481.95 -
REVOLUTION PERFORMANCE, LLC Piston Kit RP301-414W
REVOLUTION PERFORMANCE, LLC
$495.95A high-performance piston kit built for sustained power and reliability under extreme combustion pressures. The RP301-414W delivers reduced thermal expansion and superior durability—critical when you're pushing engine limits at the track or in...09106389- SKU:
- 09106389
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- BORE SIZE IMPERIAL:
- 3.563'
- COMPRESSION RATIO IMPERIAL:
- 10.1:1
- DISPLACEMENT:
- 1250 CC
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PISTON HEAD SHAPE:
- DISHED
- STROKE LENGTH IMPERIAL:
- 3-15/16'
$495.95 -
On Sale
S&S CYCLE Piston Kit 92-1214
S&S CYCLE
MSRP: $546.95Now: $492.26Was: $546.95Building a stroker engine demands pistons engineered to handle increased displacement and cylinder pressure—these S&S forged pistons are purpose-built for the 106" stroker platform. The 3-7/8" bore and forged construction deliver the durability required...20012910- SKU:
- 20012910
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- BORE SIZE IMPERIAL:
- 3.875'
- STROKE LENGTH IMPERIAL:
- 4-1/2'
- BORE - OVERSIZE:
- +0,005'
- PISTON MATERIAL:
- FORGED ALUMINUM
- UNITS:
- KIT
- DISPLACEMENT:
- 106'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
MSRP: $546.95Now: $492.26Was: $546.95 -
On Sale
S&S CYCLE Piston Kit 106-0433
S&S CYCLE
MSRP: $481.95Now: $433.76Was: $481.95If you're running an 883cc or 1200cc Big Twin and want genuine displacement gains without a complete engine teardown, this S&S piston kit delivers a straightforward path to 1250cc performance. The 10.3:1 compression ratio strikes a practical balance...09105021- SKU:
- 09105021
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- BORE - OVERSIZE:
- +0,005'
- PISTON HEAD SHAPE:
- FLAT TOP
- TYPE:
- REPLACEMENT
- DISPLACEMENT:
- 103'
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.005'
- BORE SIZE IMPERIAL:
- 3.875'
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
MSRP: $481.95Now: $433.76Was: $481.95Qty in Cart: 0Quantity:Price:MSRP: $481.95Now: $433.76Was: $481.95Subtotal: -
On Sale
S&S CYCLE Piston Kit 92-2046
S&S CYCLE
MSRP: $484.95Now: $436.46Was: $484.95If you're running a Harley Big Twin and want genuine displacement gains without an engine swap, the S&S CYCLE 1250cc Piston Kit delivers the capacity increase your machine needs. Moving from 883cc or 1200cc to 1250cc unlocks measurable torque and...09100295- SKU:
- 09100295
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 89'
- TYPE:
- REPLACEMENT
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- BORE SIZE IMPERIAL:
- 3.500'
- PISTON HEAD SHAPE:
- DOMED
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
MSRP: $484.95Now: $436.46Was: $484.95 -
On Sale
S&S CYCLE Piston Kit 92-2047
S&S CYCLE
MSRP: $484.95Now: $436.46Was: $484.95If you're running an 883cc or 1200cc Big Twin and want real power gains without a complete engine rebuild, the S&S CYCLE Piston Kit 92-2047 delivers a straightforward path to 1250cc displacement and measurable performance improvement. This cast...09100297- SKU:
- 09100297
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- BORE - OVERSIZE:
- +0,010'
- PISTON HEAD SHAPE:
- DOMED
- TYPE:
- REPLACEMENT
- DISPLACEMENT:
- 89'
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- KIT
MSRP: $484.95Now: $436.46Was: $484.95Qty in Cart: 0Quantity:Price:MSRP: $484.95Now: $436.46Was: $484.95Subtotal: -
On Sale
S&S CYCLE Piston Kit 106-5495
S&S CYCLE
MSRP: $469.95Now: $422.96Was: $469.95A piston kit is foundational to reliable high-RPM performance and longevity. The S&S Cycle 106-5495 delivers forged construction that resists detonation and thermal stress, while modern alloy chemistry and optimized skirt profiles keep noise and friction...09101918- SKU:
- 09101918
- Availability:
- Ships Same Business Day
- Weight:
- 2.89 LBS
- BORE SIZE IMPERIAL:
- 3.4375'
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- UNITS:
- KIT
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 8.0:1
- DISPLACEMENT:
- 74'
- TYPE:
- LOW COMPRESSION
- RIDING STYLE:
- STREET
MSRP: $469.95Now: $422.96Was: $469.95 -
On Sale
S&S CYCLE Piston Kit 106-5511
S&S CYCLE
MSRP: $410.95Now: $369.86Was: $410.95If you're building or rebuilding a high-displacement engine, piston quality directly impacts reliability, ring seal, and how your engine responds under sustained load. The S&S Cycle 106-5511 delivers forged strength with modern alloy metallurgy designed...09101923- SKU:
- 09101923
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 8.0:1
- TYPE:
- LOW COMPRESSION
- DISPLACEMENT:
- 80'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
MSRP: $410.95Now: $369.86Was: $410.95Qty in Cart: 0Quantity:Price:MSRP: $410.95Now: $369.86Was: $410.95Subtotal: -
On Sale
S&S CYCLE Piston Kit 106-5512
S&S CYCLE
MSRP: $410.95Now: $369.86Was: $410.95A quality piston kit is the foundation of reliable engine performance, and the S&S Cycle 106-5512 delivers the strength and precision you need for high-demand applications. These forged pistons are engineered to handle sustained power while minimizing...09101924- SKU:
- 09101924
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- BORE - OVERSIZE:
- +0,010'
- BORE SIZE IMPERIAL:
- 3.510'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- DISPLACEMENT:
- 80'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- LOW COMPRESSION
- COMPRESSION RATIO IMPERIAL:
- 8.0:1
- PISTON MATERIAL:
- FORGED
MSRP: $410.95Now: $369.86Was: $410.95 -
On Sale
S&S CYCLE Piston Kit 106-5513
S&S CYCLE
MSRP: $410.95Now: $369.86Was: $410.95Upgrading to forged pistons is essential if you're pushing your engine beyond stock limits—factory pistons simply can't handle the sustained stress of high RPM and boost conditions. The S&S CYCLE 106-5513 kit delivers the strength and reliability you...09101925- SKU:
- 09101925
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- BORE - OVERSIZE:
- +0,020'
- DISPLACEMENT:
- 80'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.520'
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- COMPRESSION RATIO IMPERIAL:
- 8.0:1
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- LOW COMPRESSION
MSRP: $410.95Now: $369.86Was: $410.95 -
On Sale
S&S CYCLE Piston Kit 106-5514
S&S CYCLE
MSRP: $410.95Now: $369.86Was: $410.95If you're building or rebuilding a high-performance engine, piston quality directly impacts reliability, longevity, and power output. The S&S Cycle 106-5514 delivers forged strength with modern alloy engineering designed to withstand extreme combustion...09101926- SKU:
- 09101926
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- DISPLACEMENT:
- 80'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- BORE SIZE IMPERIAL:
- 3.530'
- COMPRESSION RATIO IMPERIAL:
- 8.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- LOW COMPRESSION
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- +0,030'
MSRP: $410.95Now: $369.86Was: $410.95 -
On Sale
S&S CYCLE Piston Kit 106-5503
S&S CYCLE
MSRP: $469.95Now: $422.96Was: $469.95Engine longevity and reliable power delivery depend on piston quality—and S&S Cycle's forged construction delivers the strength and thermal stability your engine demands. Whether you're building a high-displacement cruiser or refreshing a tired...09101927- SKU:
- 09101927
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- TYPE:
- HIGH COMPRESSION
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.4375'
- DISPLACEMENT:
- 74'
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 3-31/32'
- UNITS:
- KIT
MSRP: $469.95Now: $422.96Was: $469.95Qty in Cart: 0Quantity:Price:MSRP: $469.95Now: $422.96Was: $469.95Subtotal: -
On Sale
S&S CYCLE Piston Kit 106-5519
S&S CYCLE
MSRP: $410.95Now: $369.86Was: $410.95A quality piston kit is the foundation of a reliable, high-revving engine—and the S&S Cycle 106-5519 delivers the strength and precision your build demands. Forged construction provides superior durability under extreme load and temperature cycles, while...09101932- SKU:
- 09101932
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 80'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- HIGH COMPRESSION
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE IMPERIAL:
- 3.500'
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
MSRP: $410.95Now: $369.86Was: $410.95Qty in Cart: 0Quantity:Price:MSRP: $410.95Now: $369.86Was: $410.95Subtotal: -
On Sale
S&S CYCLE Piston Kit 106-5520
S&S CYCLE
MSRP: $410.95Now: $369.86Was: $410.95Whether you're building a high-output big-twin or refreshing a time-tested engine, the S&S Cycle 106-5520 piston kit delivers the strength and longevity you need for sustained performance. Forged construction resists detonation and wear far better than...09101933- SKU:
- 09101933
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- BORE - OVERSIZE:
- +0,010'
- DISPLACEMENT:
- 80'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- BORE SIZE IMPERIAL:
- 3.510'
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
- TYPE:
- HIGH COMPRESSION
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
MSRP: $410.95Now: $369.86Was: $410.95 -
On Sale
S&S CYCLE Piston Kit 106-5521
S&S CYCLE
MSRP: $410.95Now: $369.86Was: $410.95When you're building or rebuilding a high-performance engine, your pistons are the foundation of reliability and power delivery. The S&S Cycle 106-5521 piston kit delivers forged strength and modern alloy construction to handle sustained high RPM...09101934- SKU:
- 09101934
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- BORE - OVERSIZE:
- +0,020'
- BORE SIZE IMPERIAL:
- 3.520'
- DISPLACEMENT:
- 80'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- BORE OVERSIZE - IMPERIAL:
- +0.020'
- PISTON MATERIAL:
- FORGED
- TYPE:
- HIGH COMPRESSION
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
MSRP: $410.95Now: $369.86Was: $410.95 -
On Sale
S&S CYCLE Piston Kit 106-5522
S&S CYCLE
MSRP: $410.95Now: $369.86Was: $410.95Engine longevity and reliable performance depend on pistons engineered to withstand extreme combustion pressures without sacrificing efficiency. The S&S Cycle Piston Kit 106-5522 delivers forged construction and modern alloy technology that reduces noise...09101935- SKU:
- 09101935
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- BORE - OVERSIZE:
- +0,030'
- DISPLACEMENT:
- 80'
- STROKE LENGTH IMPERIAL:
- 4-1/4'
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.530'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- TYPE:
- HIGH COMPRESSION
- BORE OVERSIZE - IMPERIAL:
- +0.030'
- PISTON MATERIAL:
- FORGED
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
MSRP: $410.95Now: $369.86Was: $410.95Qty in Cart: 0Quantity:Price:MSRP: $410.95Now: $369.86Was: $410.95Subtotal: -
On Sale
S&S CYCLE Piston Kit 106-5554
S&S CYCLE
MSRP: $484.95Now: $436.46Was: $484.95If you're running an 883cc or 1200cc Big Twin and want measurable gains in displacement and power without a complete engine rebuild, the S&S CYCLE Piston Kit 106-5554 delivers a straightforward path to 1250cc performance. This cast flat-topped design...09101936- SKU:
- 09101936
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.25:1
- DISPLACEMENT:
- 89'
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.500'
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- TYPE:
- REPLACEMENT
- UNITS:
- KIT
- PISTON HEAD SHAPE:
- FLAT TOP
MSRP: $484.95Now: $436.46Was: $484.95 -
On Sale
S&S CYCLE Piston Kit 106-5555
S&S CYCLE
MSRP: $484.95Now: $436.46Was: $484.95If you're serious about extracting more power from your Big Twin, displacement is king—and this S&S piston kit delivers exactly that. By bumping your 883cc or 1200cc engine to a full 1250cc, you'll gain meaningful torque and horsepower without requiring...09101937- SKU:
- 09101937
- Availability:
- Ships Same Business Day
- Weight:
- 2.40 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.25:1
- DISPLACEMENT:
- 89'
- BORE - OVERSIZE:
- +0,010'
- PISTON MATERIAL:
- FORGED
- BORE SIZE IMPERIAL:
- 3.500'
- PISTON HEAD SHAPE:
- FLAT TOP
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 4-5/8'
- UNITS:
- KIT
- BORE OVERSIZE - IMPERIAL:
- +0.010'
- RIDING STYLE:
- STREET
- TYPE:
- REPLACEMENT
MSRP: $484.95Now: $436.46Was: $484.95
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.
