KB Hypereutectic Piston 4.280" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 6.0 cc 11000403 18-gauge aluminized-steel case with 409

18-gauge aluminized-steel case with 409 stainless steel internals

RPM Air-Gap and Torker II manifolds and with Performer manifolds on large cubic-inch engines

DO NOT apply directly to exhaust components

5 at low everyday prices

Reprogram Any Time To Accommodate Changes

KB Hypereutectic Piston 4.280" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 6.0 cc 11000403 18-gauge aluminized-steel case with 409Product Description: Piston KB Series Hypereutectic 4. 280 in Bore 5 64 x 5 64 x 3 16 in Ring Grooves Plus 6. 00 cc Mopar B Series 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