KB Hypereutectic Piston 4.155" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 17.0 cc 3552024-13- S The pressure on the head

The pressure on the head from the earmuffs can be adjusted by changing the special foam rubber pads (supplied) positioned between the earmuff and the helmet

NTK Oxygen Sensor

For 351W swap

46mm Piston

KB Hypereutectic Piston 4.155" Bore 5/64 x 5/64 x 3/16" Ring Grooves - Plus 17.0 cc 3552024-13- S The pressure on the headProduct Description: Piston KB Series Hypereutectic 4. 155 in Bore 5 64 x 5 64 x 3 16 in Ring Grooves Plus 17. 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