KB Hypereutectic Piston 4.290" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 5.0 cc 2010428 5 in OD Coil Springs

5 in OD Coil Springs

For Big Block Chevrolet engines originally equipped with exhaust valve rotators

ΓÇóMulti-fuel compatible: Approved for use with leaded and unleaded Gasoline

two -8AN fittings

Engine Durability

KB Hypereutectic Piston 4.290" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 5.0 cc 2010428 5 in OD Coil SpringsProduct Description: Piston KB Series Hypereutectic 4. 290 in Bore 5 64 x 5 64 x 3 16 in Ring Grooves Minus 8. 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