6020-4030 425 Big Block Oldsmobile FX Series -12cc Flat Top Oldsmobile Forged Piston Set 4.030 inch bore Pin Dia.: 0.98" Comp Height: 1.625"
$669.95
406 Big Block Oldsmobile, FX, Comp Height: 1.625, -12cc Flat Top , PIN: .98", Full-Floating or Press Fit, Ring Groove: 1/16-1/16-3/16" , Stroke: 3.975", ROD: 7, Approx Comp Ratio: 72cc-10, 75cc-9.72, 77cc-9.54
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