JE Pistons Standard 23 Domed Forged Piston Set - SB Chevy - 420 C.I. - 4.155" Bore Size - 3.875" Stroke - 6.000" Rod Length Clutch Installation is as simple as

Installation is as simple as removing factory module and replacing with Holley module

240-33 ohm

135 Hi-Tech Pushrods have the same diameter oil holes

Carburetor Recommendations: Any size or type of carburetor class allows

JE Pistons Standard 23 Domed Forged Piston Set - SB Chevy - 420 C.I. - 4.155" Bore Size - 3.875" Stroke - 6.000" Rod Length Clutch Installation is as simple asThese high compression pistons are compatible with most aftermarket 23? heads and are ideal for drag racing and circle track applications. Valve reliefs will accommodate oversized valves and long duration, tight lobe separation cams. Precision CNC ring grooves are designed for 1 16, 1 16, 3 16 rings. Will not fit Pro Topline or Brodix 11X cylinder heads. Includes: Pin #927 2750 15 51S (130g) Double Spiro locks #927 042 CS Contact reduction grooves