KB Hypereutectic Piston 4.000" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 7.0 cc 21300XR-O NPT inlet and outlet ports

NPT inlet and outlet ports

Cross Flags

bracket fits 3" diameter axle tube and will work with most 11

#335910 manifold height: 6

KB Hypereutectic Piston 4.000" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Minus 7.0 cc 21300XR-O NPT inlet and outlet portsProduct 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