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SY221-90004-12-B
5 in (114 mm)4
ISK9995RAD
when the supercharger is still producing boost
CRS5780F3D
Big Block Flat Top - Standard Deck Block Forged Piston J257968 Caps SY221-90004-12-BBig Block Flat Top Standard Deck Block Forged PistonBig Block Chevy 565, 4. 600" bore, 6. 385" rod length, 3. 0cc dome volume J257968 57968 These big block pistons are compatible with forced induction, nitrous (Except 1. 120 compression height) and angle milled heads. Valve reliefs will accommodate oversized valves and long duration, tight lobe separation cams. Precision CNC machined ring grooves accept 1 16, 1 16, 3 16 rings. Will fit both open and
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