Forged Pistons Chevy 454ci.
Hollow Dome Top .290''.
4.280'' Bore (+.030'').
Use w/6.385'' Connecting Rod & 4.000'' Crank Stroke.
Comp.
Ratio: 12.9/96.5cc; 10.7/108cc; 10.3/119cc.
8/pkg Technical Specs: Alloy: Premium High Ductility 2618.
Bore: 4.280''.
Crankshaft Stroke: 4.000''.
Connecting Rod Length: 6.385''.
Deck Height: 9.800''.
Compression Height: 1.395''.
Pin Size: 0.990'' x 2.750''.
Pin Location: Centered.
Hollow Dome Top: .290'' 27cc 1 Valve Relief (Closed Chamber Head).
Intake Valve Relief: 0.286'' Depth / 2.300'' Diameter.
Exhaust Valve Relief: N/A.
Top Landing Height: 0.365''.
Ring Grooves: 1/16'' Top; 1/16'' Middle; 3/16'' Bottom.
Gram Weight: 616/141.
Compression Ratio: 12.9:1 w/96.5cc Heads; 10.7:1 w/108cc Heads; 10.3:1 w/119cc.
Designed for O.E.
and Edelbrock style cylinder heads.