JE Pistons Standard 23 Degree Domed Forged Piston Set - SB Chevy - 420 C.I. - 4.155" Bore Size - 3.875" Stroke - 6.000" Rod Length RG20003XS Fabricated from 1/4" HR steel

Fabricated from 1/4" HR steel to fit to existing frame mounts the same as a Chevy

1973-1977 Chevrolet Monte Carlo

or in the corners

The 4775 features a 1

Engineered with 60% more silicon than comparable competitive replacements

JE Pistons Standard 23 Degree Domed Forged Piston Set - SB Chevy - 420 C.I. - 4.155" Bore Size - 3.875" Stroke - 6.000" Rod Length RG20003XS Fabricated from 1/4" HR steelThese 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