KB Piston Hypereutectic 4.250" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 26.0 cc 016437NRSI six-point hex bolts stand up

six-point hex bolts stand up to repeated adjustments and feature an integral washer flange for greater load distribution

AEM offers two different water/methanol controller designs for gas vehicles:

216/220 Duration

1972-1975 GMC Sprint

KB Piston Hypereutectic 4.250" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 26.0 cc 016437NRSI six-point hex bolts stand upProduct Description: Piston KB Series Hypereutectic 4. 250 in Bore 5 64 x 5 64 x 3 16 in Ring Grooves Plus 26. 00 cc Big 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