JE Pistons Standard 23 Degree Domed Forged Piston Set - SB Chevy - 428 C.I. - 4.125" Bore Size - 4.000" Stroke - 6.000" Rod Length Motor Mount Includes hex adjusting nuts

Includes hex adjusting nuts

locking the cam position in place

185 in thick

1954-1962 Mercury Monterey

8 AN Male to 4 AN Male

JE Pistons Standard 23 Degree Domed Forged Piston Set - SB Chevy - 428 C.I. - 4.125" Bore Size - 4.000" Stroke - 6.000" Rod Length Motor Mount Includes hex adjusting nutsThese 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