KB Performance
KB Performance is a trusted manufacturer of high-performance motorcycle pistons engineered for strength, efficiency and consistent combustion. Widely known for KB Performance piston kits, the brand supports engine builds with precision-fit solutions for Twin Cam, Evolution, Sportster and Milwaukee-Eight platforms. Riders and engine builders rely on KB pistons for accurate compression ratios, durable construction and dependable performance across street and high-output applications.
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Out of stock
Kb Performance - KB909C.010 - Forged Pistons Tc96 To 103Ci 10.5:1 .010
KB Performance
$337.95Kb Pistons - KB909C.010 - Forged Pistons Tc96 To 103Ci 10.5:1 .010FeaturesKB forged pistons are made from 4032 forged alloy with an 11% silicon content, formed in a forging press and then fully...$337.95 -
Out of stock
Kb Performance - KB920C.STD - Forged Pistons Evo 80Ci 9.5:1 Std
KB Performance
$313.95Kb Pistons - KB920C.STD - Forged Pistons Evo 80Ci 9.5:1 StdFeaturesKB forged pistons are made from 4032 forged alloy with an 11% silicon content, formed in a forging press and then fully machined...$313.95 -
Kb Performance - KB920C.005 - Forged Pistons Evo 80Ci 9.5:1 .005
KB Performance
$313.95Kb Pistons - KB920C.005 - Forged Pistons Evo 80Ci 9.5:1 .005FeaturesKB forged pistons are made from 4032 forged alloy with an 11% silicon content, formed in a forging press and then fully machined...$313.95 -
Out of stock
Kb Performance - KB920C.020 - Forged Pistons Evo 80Ci 9.5:1 .020
KB Performance
$313.95Kb Pistons - KB920C.020 - Forged Pistons Evo 80Ci 9.5:1 .020FeaturesKB forged pistons are made from 4032 forged alloy with an 11% silicon content, formed in a forging press and then fully machined...$313.95 -
Out of stock
Kb Performance - KB921C.005 - Forged Pistons Evo 80Ci 10.5:1 .005
KB Performance
$313.95Kb Pistons - KB921C.005 - Forged Pistons Evo 80Ci 10.5:1 .005FeaturesKB forged pistons are made from 4032 forged alloy with an 11% silicon content, formed in a forging press and then fully machined...$313.95 -
Out of stock
Kb Performance - KB921C.010 - Forged Pistons Evo 80Ci 10.5:1 .010
KB Performance
$313.95Kb Pistons - KB921C.010 - Forged Pistons Evo 80Ci 10.5:1 .010FeaturesKB forged pistons are made from 4032 forged alloy with an 11% silicon content, formed in a forging press and then fully machined...$313.95 -
Out of stock
Kb Performance - KB921C.020 - Forged Pistons Evo 80Ci 10.5:1 .020
KB Performance
$313.95Kb Pistons - KB921C.020 - Forged Pistons Evo 80Ci 10.5:1 .020FeaturesKB forged pistons are made from 4032 forged alloy with an 11% silicon content, formed in a forging press and then fully machined...$313.95 -
Out of stock
Kb Performance - KB925C.STD - Forged Pistons 883 To 1200 10.5:1 Std
KB Performance
$313.95Kb Pistons - KB925C.STD - Forged Pistons 883 To 1200 10.5:1 StdFeaturesKB forged pistons are made from 4032 forged alloy with an 11% silicon content, formed in a forging press and then fully machined...$313.95 -
Out of stock
Kb Performance - KB925C.010 - Forged Pistons 883 To 1200 10.5:1 .010
KB Performance
$313.95Kb Pistons - KB925C.010 - Forged Pistons 883 To 1200 10.5:1 .010FeaturesKB forged pistons are made from 4032 forged alloy with an 11% silicon content, formed in a forging press and then fully...$313.95 -
Out of stock
Kb Performance - KB925C.020 - Forged Pistons 883 To 1200 10.5:1 .020
KB Performance
$313.95Kb Pistons - KB925C.020 - Forged Pistons 883 To 1200 10.5:1 .020FeaturesKB forged pistons are made from 4032 forged alloy with an 11% silicon content, formed in a forging press and then fully...$313.95 -
Kb Performance - 0927X208K - Wrist Pin 0927X208K
KB Performance
$4.95Kb Pistons - 0927X208K - Wrist Pin 0927X208KFeaturesFitment2015-2016Harley DavidsonFLRT Freewheeler2015-2016Harley DavidsonFLHTCUL Electra Glide Ultra Classic Low2015-2016Harley DavidsonFLHTKL...$4.95 -
Kb Performance - 0927X216K - Wrist Pin 0927X216K
KB Performance
$3.49Kb Pistons - 0927X216K - Wrist Pin 0927X216KFeaturesFitment2014-2017Harley DavidsonXL1200T Super Low Touring1999-2006Harley DavidsonFLHR Road King1999-2006Harley DavidsonFLHTC Electra Glide...$3.49 -
Out of stock
Kb Performance - 0927X300K - Wrist Pin 0927X300K
KB Performance
$3.49Kb Pistons - 0927X300K - Wrist Pin 0927X300KFeaturesFitment2015-2016Harley DavidsonFLRT Freewheeler2015-2016Harley DavidsonFLHTCUL Electra Glide Ultra Classic Low2015-2016Harley DavidsonFLHTKL...$3.49 -
Kb Performance - 0792X216K - Wrist Pin 0792X216K
KB Performance
$2.95Kb Pistons - 0792X216K - Wrist Pin 0792X216KFeaturesFitment1994-1998Harley DavidsonFLHR Road King1983-1998Harley DavidsonFLHTC Electra Glide Classic1989-1998Harley DavidsonFLHTCU Electra Glide Ultra...$2.95 -
Out of stock
Kb Performance - 0791X216K - Wrist Pin 0791X216K
KB Performance
$2.95Kb Pistons - 0791X216K - Wrist Pin 0791X216KFeaturesFitment1983-1984Harley DavidsonFLHTC Electra Glide Classic2009-2019Harley DavidsonXL883N Iron 8832005-2019Harley DavidsonXL883L Super...$2.95 -
Kb Performance - PRJ100-3 - Wrist Pin Locks
KB Performance
$1.95Kb Pistons - PRJ100-3 - Wrist Pin LocksFeaturesFitment2015-2016Harley DavidsonFLRT Freewheeler2015-2016Harley DavidsonFLHTCUL Electra Glide Ultra Classic Low2015-2016Harley DavidsonFLHTKL Electra...$1.95 -
Kb Performance - RRN-81 - Wrist Pin Locks
KB Performance
$1.95Kb Pistons - RRN-81 - Wrist Pin LocksFeaturesFitment2014-2017Harley DavidsonXL1200T Super Low Touring1994-1998Harley DavidsonFLHR Road King1983-1998Harley DavidsonFLHTC Electra Glide...$1.95 -
Kb Performance - KB542LCA.STD - Piston Super Duty 4.125" Bore M8 114/117 To 120" Std
KB Performance
$449.95Kb Pistons - KB542LCA.STD - Piston Super Duty 4.125" Bore M8 114/117 To 120" StdFeaturesAnodized top ring groove and crownLine2Line abradable skirt coating applied to .003" total thickness for a ZERO...$449.95 -
Out of stock
Kb Performance - KB542LCA.010 - Piston Super Duty 4.125" Bore M8 114/117 To 120" +.010
KB Performance
$449.95Kb Pistons - KB542LCA.010 - Piston Super Duty 4.125" Bore M8 114/117 To 120" +.010FeaturesAnodized top ring groove and crownLine2Line abradable skirt coating applied to .003" total thickness for a...$449.95 -
Out of stock
Kb Performance - KB542LCA.020 - Piston Super Duty 4.125" Bore M8 114/117 To 120" +.020
KB Performance
$449.95Kb Pistons - KB542LCA.020 - Piston Super Duty 4.125" Bore M8 114/117 To 120" +.020FeaturesAnodized top ring groove and crownLine2Line abradable skirt coating applied to .003" total thickness for a...$449.95 -
Kb Performance - KB660LCA.STD - Piston Super Duty Big Bore Tc 96 To 103 10:1 Std
KB Performance
$424.95Kb Pistons - KB660LCA.STD - Piston Super Duty Big Bore Tc 96 To 103 10:1 StdFeaturesGlobal Trade Item Number: 800745243379Anodized top ring groove and crownLine2Line abradable skirt coating applied...$424.95 -
Out of stock
Kb Performance - KB660LCA.010 - Piston Super Duty Big Bore Tc 96 To 103 10:1 +.010
KB Performance
$424.95Kb Pistons - KB660LCA.010 - Piston Super Duty Big Bore Tc 96 To 103 10:1 +.010FeaturesGlobal Trade Item Number: 800745243355Anodized top ring groove and crownLine2Line abradable skirt coating applied...$424.95 -
Out of stock
Kb Performance - KB661LCA.STD - Piston Super Duty Big Bore Tc 96/103 To 110 10:1 Std
KB Performance
$424.95Kb Pistons - KB661LCA.STD - Piston Super Duty Big Bore Tc 96/103 To 110 10:1 StdFeaturesGlobal Trade Item Number: 800745243423Anodized top ring groove and crownLine2Line abradable skirt coating...$424.95 -
Out of stock
Kb Performance - KB661LCA.010 - Piston Super Duty Big Bore Tc 96/103 To 110 10:1 +.010
KB Performance
$424.95Kb Pistons - KB661LCA.010 - Piston Super Duty Big Bore Tc 96/103 To 110 10:1 +.010FeaturesGlobal Trade Item Number: 800745236319Anodized top ring groove and crownLine2Line abradable skirt coating...$424.95 -
Out of stock
Kb Performance - KB662LCA.STD - Piston Super Duty Big Bore Tc 96/103 To 117 10:1 Std
KB Performance
$424.95Kb Pistons - KB662LCA.STD - Piston Super Duty Big Bore Tc 96/103 To 117 10:1 StdFeaturesGlobal Trade Item Number: 800745248107Anodized top ring groove and crownLine2Line abradable skirt coating...$424.95 -
Out of stock
Kb Performance - KB662LCA.010 - Piston Super Duty Big Bore Tc 96/103 To 117 10:1 +.010
KB Performance
$424.95Kb Pistons - KB662LCA.010 - Piston Super Duty Big Bore Tc 96/103 To 117 10:1 +.010FeaturesGlobal Trade Item Number: 800745248077Anodized top ring groove and crownLine2Line abradable skirt coating...$424.95 -
Out of stock
Kb Performance - KB576LCA.STD - Piston Super Duty 4.250" Bore M8 107 To 124" Std 11.4:1
KB Performance
$465.95Kb Pistons - KB576LCA.STD - Piston Super Duty 4.250" Bore M8 107 To 124" Std 11.4:1FeaturesGlobal Trade Item Number: 800745266941Anodized top ring groove and crownLine2Line abradable skirt coating...$465.95 -
Out of stock
Kb Performance - KB576LCA.005 - Piston Super Duty 4.250" Bore M8 107 To 124" +.005 11.4:1
KB Performance
$465.95Kb Pistons - KB576LCA.005 - Piston Super Duty 4.250" Bore M8 107 To 124" +.005 11.4:1FeaturesGlobal Trade Item Number: 800745266958Anodized top ring groove and crownLine2Line abradable skirt coating...$465.95 -
Out of stock
Kb Performance - KB595LCA.STD - Piston Super Duty 4.250" Bore M8 107 To 124" Std 11.8:1
KB Performance
$465.95Kb Pistons - KB595LCA.STD - Piston Super Duty 4.250" Bore M8 107 To 124" Std 11.8:1FeaturesGlobal Trade Item Number: 800745276155Anodized top ring groove and crownLine2Line abradable skirt coating...$465.95 -
Kb Performance - KB595LCA.005 - Piston Super Duty 4.250" Bore M8 107 To 124" +.005 11.8:1
KB Performance
$465.95Kb Pistons - KB595LCA.005 - Piston Super Duty 4.250" Bore M8 107 To 124" +.005 11.8:1FeaturesGlobal Trade Item Number: 800745276162Anodized top ring groove and crownLine2Line abradable skirt coating...$465.95 -
Out of stock
Kb Performance - KB596LCA.STD - Piston Super Duty 4.250" Bore M8 114/117 To 128" Std 11.7:1
KB Performance
$465.95Kb Pistons - KB596LCA.STD - Piston Super Duty 4.250" Bore M8 114/117 To 128" Std 11.7:1FeaturesGlobal Trade Item Number: 800745276186Anodized top ring groove and crownLine2Line abradable skirt...$465.95 -
Out of stock
Kb Performance - KB596LCA.005 - Piston Super Duty 4.250" Bore M8 114/117 To 128"+.005 11.7:1
KB Performance
$465.95Kb Pistons - KB596LCA.005 - Piston Super Duty 4.250" Bore M8 114/117 To 128"+.005 11.7:1FeaturesGlobal Trade Item Number: 800745276179Anodized top ring groove and crownLine2Line abradable skirt...$465.95 -
Kb Performance - KB426C.STD - Piston Kit - 3.750" Standard - 10.5:1 CR - 88" Twin Cam
KB Performance
$295.95Kb Performance - KB426C.STD - Piston Kit - 3.750" Standard - 10.5:1 CR - 88" Twin CamFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit...$295.95 -
Out of stock
Kb Performance - KB426C.020 - Piston Kit - 3.750" +0.020" - 10.5:1 CR - 88" Twin Cam
KB Performance
$295.95Kb Performance - KB426C.020 - Piston Kit - 3.750" +0.020" - 10.5:1 CR - 88" Twin CamFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and...$295.95 -
Out of stock
Kb Performance - KB426C.010 - Piston Kit - 3.750" +0.010" - 10.5:1 CR - 88" Twin Cam
KB Performance
$295.95Kb Performance - KB426C.010 - Piston Kit - 3.750" +0.010" - 10.5:1 CR - 88" Twin CamFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and...$295.95 -
Out of stock
Kb Performance - KB426C.005 - Piston Kit - 3.750" +0.005" - 10.5:1 CR - 88" Twin Cam
KB Performance
$281.29Kb Performance - KB426C.005 - Piston Kit - 3.750" +0.005" - 10.5:1 CR - 88" Twin CamFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and...$281.29 -
Kb Performance - KB425C.030 - Piston Kit - 3.750" +0.030" - 8.8:1 CR - 88" Twin Cam
KB Performance
$287.95Kb Performance - KB425C.030 - Piston Kit - 3.750" +0.030" - 8.8:1 CR - 88" Twin CamFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and...$287.95 -
Kb Performance - KB425C.020 - Piston Kit - 3.750" +0.020" - 8.8:1 CR - 88" Twin Cam
KB Performance
$287.95Kb Performance - KB425C.020 - Piston Kit - 3.750" +0.020" - 8.8:1 CR - 88" Twin CamFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and...$287.95 -
Kb Performance - KB425C.010 - Piston Kit - 3.750" +0.010" - 8.8:1 CR - 88" Twin Cam
KB Performance
$287.95Kb Performance - KB425C.010 - Piston Kit - 3.750" +0.010" - 8.8:1 CR - 88" Twin CamFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and...$287.95 -
Out of stock
Kb Performance - KB425C.STD - Piston Kit - 3.750" Standard - 8.8:1 CR - 88" Twin Cam
KB Performance
$287.95Kb Performance - KB425C.STD - Piston Kit - 3.750" Standard - 8.8:1 CR - 88" Twin CamFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and...$287.95
KB Performance – High-Compression Motorcycle Pistons for Twin Cam, Evolution, Sportster & Milwaukee-Eight Engines
KB Performance specializes in advanced forged and hypereutectic piston technology designed to meet the demands of modern Harley-Davidson engine builds. The brand’s extensive lineup of motorcycle piston kits covers popular configurations including Twin Cam big bore pistons, Evolution engine pistons, Sportster 883 to 1200 conversion pistons and Milwaukee-Eight big bore piston kits. Each design is carefully engineered to deliver balanced compression, controlled expansion and reliable ring seal for long-term engine durability.
Engine builders choose KB Performance pistons for their precise machining and application-specific compression ratios that support both stock and modified cylinder heads. From 95”, 103” and 110” Twin Cam builds to large-displacement M8 114”, 117”, 124” and 128” big bore conversions, KB piston kits help optimize combustion efficiency and throttle response. These pistons are well-suited for performance upgrades where strength, heat control and consistency are critical.
In addition to complete piston kits, KB Performance offers essential engine assembly components such as wrist pin lock rings and installation hardware to support accurate and repeatable engine assembly. Whether refreshing a stock engine or building a high-compression performance setup, KB Performance delivers motorcycle pistons that align with professional engine-building standards and proven real-world results.