KB Hypereutectic Piston 4.000" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 7.0 cc 21300XR-O This allows a tighter lap

This allows a tighter lap belt and it will load more quickly in the event of an impact

Radiator Refill Coupling

Fits rear 5 feet of cargo area

1976-1978 GMC C15 Suburban

KB Hypereutectic Piston 4.000" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 7.0 cc 21300XR-O This allows a tighter lapProduct Description: Piston KB Series Hypereutectic 4. 000 in Bore 5 64 x 5 64 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