Kb Performance

KB Performance #KB297.040 - Piston Kit - 3.498" +0.040" - 8.3:1 CR - 4.250" Stroke - 80" Big Twin

Piston Kit - 3.498" +0.040" - 8.3:1 CR - 4.250" Stroke - 80" Big TwinFeaturesManufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloyAllow a tighter...

KB Performance #KB266.010 - Piston Kit - 3.498" +0.010" - 10.5:1 CR - 80" Evolution Big Twin

Piston Kit - 3.498" +0.010" - 10.5:1 CR - 80" Evolution Big TwinFeaturesManufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloyAllow a tighter fit and...

KB Performance #KB263.040 - Piston Kit - 3.437" +0.040" - 9.0:1 CR - 74" Big Twin

Piston Kit - 3.437" +0.040" - 9.0:1 CR - 74" Big TwinFeaturesManufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloyAllow a tighter fit and longer piston...

KB Performance #KB263.010 - Piston Kit - 3.437 +0.010" - 9.0:1 CR - 74" Big Twin

Piston Kit - 3.437 +0.010" - 9.0:1 CR - 74" Big TwinFeaturesManufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloyAllow a tighter fit and longer piston and...

KB Performance #KB258.005 - Piston Kit - 3.498" +0.005" - 8.6:1 CR - 80" Evolution Big Twin

Piston Kit - 3.498" +0.005" - 8.6:1 CR - 80" Evolution Big TwinFeaturesManufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloyAllow a tighter fit and...

KB Performance #KB258.010 - Piston Kit - 3.498" +0.010" - 8.6:1 CR - 80" Evolution Big Twin

Piston Kit - 3.498" +0.010" - 8.6:1 CR - 80" Evolution Big TwinFeaturesManufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloyAllow a tighter fit and...

KB Performance #KB297.010 - Piston Kit - 3.498" +0.010" - 8.3:1 CR - 4.250" Stroke - 80" Big Twin

Piston Kit - 3.498" +0.010" - 8.3:1 CR - 4.250" Stroke - 80" Big TwinFeaturesManufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloyAllow a tighter...

KB Performance #KB263.020 - Piston Kit - 3.437" +0.020" - 9.0:1 CR - 74" Big Twin

Piston Kit - 3.437" +0.020" - 9.0:1 CR - 74" Big TwinFeaturesManufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloyAllow a tighter fit and longer piston...

KB Performance #PRJ100-4PK - Lock Ring - '98-'17 Twin Cam

Lock Ring - '98-'17 Twin CamFeaturesReplacement piston lock rings for KB Performance Piston KitSpecsRiding StyleStreetApplicationPistonTypeLock RingUnits4 PackProduct NameWrist Pin

KB Performance #RRN-81-4PK - Wrist Pin Lock Ring - '41-'99 Knucklehead/Panhead/Shovelhead/Sportster/EVO

Wrist Pin Lock Ring - '41-'99 Knucklehead/Panhead/Shovelhead/Sportster/EVOFeaturesReplacement piston lock rings for KB Performance Piston KitSpecsUnits4 PackProduct NameWrist...

KB Performance #KB596LCA.STD - Piston Kit - 4.250" Standard - 11.7:1 CR - 128" Big Bore - 114"/117" M8

Piston Kit - 4.250" Standard - 11.7:1 CR - 128" Big Bore - 114"/117" M8FeaturesValve pockets are designed to accept up to +4.00 mm oversized intake and exhaust valvesType 3...

KB Performance #KB595LCA.STD - Piston Kit - 4.250" Standard - 11.8:1 CR - 124" Big Bore - 107" M8

Piston Kit - 4.250" Standard - 11.8:1 CR - 124" Big Bore - 107" M8FeaturesValve pockets are designed to accept up to +4.00 mm oversized intake and exhaust valvesType 3 hard-anodized...

KB Performance #KB596LCA.005 - Piston Kit - 4.250" +0.005" - 11.7:1 CR - 128" Big Bore - 114"/117" M8

Piston Kit - 4.250" +0.005" - 11.7:1 CR - 128" Big Bore - 114"/117" M8FeaturesValve pockets are designed to accept up to +4.00 mm oversized intake and exhaust valvesType 3...

KB Performance #KB595LCA.005 - Piston Kit - 4.250" +0.005" - 11.8:1 CR - 124" Big Bore - 107" M8

Piston Kit - 4.250" +0.005" - 11.8:1 CR - 124" Big Bore - 107" M8FeaturesValve pockets are designed to accept up to +4.00 mm oversized intake and exhaust valvesType 3...

KB Performance #KB425C.STD - Piston Kit - 3.750" Standard - 8.8:1 CR - 88" Twin Cam

Kit Includes:• 2x Pistons• 2x Wrist Pins• 4x Spiral Lock Pin Clips• 2x Ring SetsFeaturesManufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and...