Chevrolet 350/400, 17-18˚ heads, flat top

Application: 

Recommended for applications using nitrous (up to 250HP shot) / boost (up to 8LBS).

Includes: 

Complete set of pistons, locks & pins.

Specifications:

Piston top type: flat top
Bore: 4.040" to 4.165".
Stroke: 3.750" to 4.000".
Rod Length: 5.700 & 6.000".
Compression height: 1.000" to 1.420".
Compression ratio (52): 12.90 to 14.30.
Compression ratio (58): 12.20 to 13.60.
Compression ratio (64): 10.10 to 11.80.
Dome volume: -6.00.
Gram weight: 450 to 471
Rings: 1/16", 1/16", 3/16".
Ring set: N/A.
Rings included: no.
Oil rail spacer: N/A.
Pin type: 5115 straight wall.
Pin diameter: .927".
Pin length: 2.500".
Pin wall: .150".
Pin weight: 118 grams.
Block height: 9.025".
Note: (1) piston rings sold separately. (2) Compression ratio based on .050 piston to head clearance (deck & gasket combined).