KB Hypereutectic Piston 4.290" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 12.0 cc 2010203 4 x 6-1/2 in Round

4 x 6-1/2 in Round Body

Liberally spray the outside of the visor with the cleaner

Built in 1bar MAP (manifold absolute pressure) sensor

9 wideband O2 sensors for accurate readings and precise tuning control

uses a diaphragm-controlled

KB Hypereutectic Piston 4.290" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 12.0 cc 2010203 4 x 6-1/2 in RoundProduct Description: Piston KB Series Hypereutectic 4. 290 in Bore 5 64 x 5 64 x 3 16 in Ring Grooves Plus 12. 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