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Chevrolet LS, flat top

Multiple options
Item number: 99177


Recommended for applications using nitrous (up to 250HP shot). Not recommended for turbo applications. Image is a representation of this item. Actual item may vary.



Complete set of pistons, locks, pins.



Piston top type: flat top. 
Bore: 3.905" to 4.155".
Stroke: 3.622 & 4.000".
Rod length: 6.098" & 6.125".
Compression height: 1.110" to 1.326".
Compression ratio (64): 10.2 to 12.6.
Compression ratio (70): 9.6 to 11.7. 
Compression ratio (72): 9.4 to 11.5.
Dome volume: -2.60 & -4.00.
Gram weight: N/A.
Rings: 1.2mm, 1.2mm, 3.0mm.
Ring set: R5067.
Rings included: yes.
Oil rail spacer: N/A.
Pin type: 5115 straight wall.
Pin diameter: .927".
Pin length: 2.300".
Pin wall: .150".
Pin weight: 107. 
Block height: 9.240".
NOTE: (1) Forged from high strength 2618-T61 aluminum with forged side reliefs with internal and external bracing (2) Optional pin upgrade available (3) Optional lateral or vertical gas porting available.