Chevy 427ci FHR Forged Pistons with solid dome .124'' and 4.250'' bore.
Use with 6.135'' connecting rod and 3.760'' crank stroke.
Compression ratios are 10.3:1/96.5cc, 9.5:1/105cc, and 8.5:1/119cc.
8/pkg.
Technical specs include premium 4032 alloy, 4.250'' bore, 3.760'' crankshaft stroke, 6.135'' connecting rod length, 9.800'' deck height, and 1.765'' compression height.
Pin size is 0.990'' x 2.750'' with centered pin location.
Solid dome top is .124'' with 10.2cc and 1 valve relief (closed chamber design).
Intake and exhaust valve reliefs are N/A.
Top landing height is 0.340''.
Ring grooves are 5/64'' top, 5/64'' middle, and 3/16'' bottom.
Gram weight is 655/141.
Compression ratios are 10.3:1 with 96.5cc heads, 9.5:1 with 105cc heads, and 8.5:1 with 119cc heads.
