Chevrolet 400, 23˚ heads, SP forging flat top

Multiple options
Item number: 89100


Not recommended for nitrous or turbo applications. Image is a representation of this item. Actual item may vary.



Complete set of pistons, locks, pins & oil rail spacers (as required). 


Piston top type: flat top
Bore: 4.125"
Stroke: 3.500"
Rod length: 6.250"
Compression height: 1.000"
Compression ratio (58): 11.57
Compression ratio (64): 10.76
Compression ratio (76): 9.47
Dome volume: -4.40
Gram weight: N/A
Rings: 1.2 1.2 3.0
Ring set: RGN4127
Rings included: Yes
Oil rail spacer: ORS-412
Pin type: 5115 straight wall
Pin diameter: .927
Pin length: 2.300
Pin wall: .150
Pin weight: 107 Grams
Block height: 9.000"
Note: (1) Forged from High Strength 2618-T61 aluminum. (2) Dedicated left and right forged side relief forgings with internal and external bracing (3) Optional pin upgrade available (4) Optional lateral or vertical gas porting available.