KB Hypereutectic Piston 4.155" Bore 1/16 x 1/16 x 3/16" Ring Grooves - Minus 7.0 cc BR10021 Polyurethane bump stop is weather

Polyurethane bump stop is weather resistant and easily adjustable by adding packers to the inner ring

Pushrod diameter: 5/16" (width of slot in guide plate)

For use in all AFCO rebuildable shocks with the perfect blend of viscosity and performance

Coil Over Kit- GD

KB Hypereutectic Piston 4.155" Bore 1/16 x 1/16 x 3/16" Ring Grooves - Minus 7.0 cc BR10021 Polyurethane bump stop is weatherProduct Description: Piston KB Series Hypereutectic 4. 155 in Bore 1 16 x 1 16 x 3 16 in Ring Grooves Minus 7. 00 cc Small Block Chevy Set of 8 Created from a high silicon aluminum alloy, KB Performance pistons are lightweight to improve throttle response and RPM changes while still being strong enough to withstand high compression and high temperatures. Each piston is engineered with race ready features like high upper compression ring locations, gas