Chevrolet big-block, closed chamber high compression

Application: 

Recommended for applications using nitrous (up to 150HP shot) / not recommended for turbo applications.

Includes:

Complete set of pistons, locks, & pins.

Specifications:

Piston top type: dome top.
Bore: 4.280" to 4.750".
Stroke: 3.760" & 4.000".
Rod length: 6.135" & 6.385".
Compression height: 1.398" to 1.768".
Compression ratio (106.00): 11.80 to 12.90
Compression ratio (112.00): 11.10 to 12.00
Compression ratio (116.00): 10.70 to 11.60
Dome volume: 36.00.
Dome height: .700".
Gram weight: 583 to 6.85
Rings: 1/16", 1/16", 3/16".
Ring set: CR9190
Rings included: no
Oil rail spacer: not included.
Pin type: 5115 straight wall.
Pin diameter: .990".
Pin length: 2.930".
Pin wall: .150". 
Pin weight: 146 grams
Block height: 9.800".
Top land: .330".
Second land: .157".
Oil land: .078".
Deck thickness: .200".
Intake cutter: 2.400".
Exhaust cutter: slant.
Intake depth: .320".
Exhaust depth: .120" up.
Note: also fits open chamber head.