Chevrolet big block, Pro-Mod 18˚ nitrous special high compression

Application: 

Recommended for applications using nitrous (400+HP shot) / not recommended for turbo applications. Image is a representation of this item. Actual item may vary.

Includes:

Complete set of pistons only.

Specifications:

Piston top type: dome top.
Bore: 4.600" & 4.625".
Stroke: 4.250" & 4.750".
Rod length: 6.535" to 6.800".
Compression height: 1.120" & 1.270".
Compression ratio (82): 15.30 to 17.20
Compression ratio (85): 14.80 to 16.60
Compression ratio (97): 13.00 to 14.60
Dome volume: 14.00.
Dome height: .180".
Gram weight: 628 to 672.
Rings: .043", 1/16", 3/16".
Ring set: CR4309.
Rings included: no.
Oil rail spacer: not included.
Pins: not included.
Pin diameter: .990".
Pin length: 2.930".
Pin wall: N/A.
Pin weight: N/A grams.
Pin buttons: B460 (not included)
Block height: 9.800". or 10.200".
Top land: .300".
Second land: .187".
Oil land: .110".
Deck thickness: .220".
Intake cutter: 2.500".
Exhaust cutter: 2.15".
Intake depth: .320".
Exhaust depth: -.020".
Note: Hard core drag racing only, with 17˚ & 18˚ Dart Big Chief, Brodix Big Duke and Brodix Pontiac.