FHR Forged Pistons for Chevy 396/402ci.
Solid Dome .580'' (Open Chamber Design).
4.125'' Bore (+.030'' 396; Standard 402).
Use with 6.135'' Connecting Rod & 3.760'' Crank Stroke.
10.6:1/119cc Compression Ratio.
8/pkg.
Notes: For a 396ci engine (4.095'' std bore), this piston will be a .030 over bore.
Compression ratio will be 10.5 on 119cc head (Open chamber head).
Technical Specs: Alloy: Premium 4032 Alloy.
Bore: 4.125''.
Crankshaft Stroke: 3.760''.
Connecting Rod Length: 6.135''.
Deck Height: 9.800''.
Compression Height: 1.765''.
Pin Size: 0.990'' x 2.750''.
Pin Location: Centered.
Solid Dome Top: .580'' 41cc 1 Valve Relief (Open Chamber Design).
Intake Valve Relief: N/A.
Exhaust Valve Relief: N/A.
Top Landing Height: 0.340''.
Ring Grooves: 5/64'' Top; 5/64'' Middle; 3/16'' Bottom.
Gram Weight: 743/141.
Compression Ratio: 10.6:1 with 119cc Heads.