90mm Billet Flat-Top Diamond Piston for 420cc OHV, 420 Predator, and +.080 Over GX390
Stroker Version - Piston has .050 shorter compression height to fit ARC Stroker Cranks
High-quality 90mm bore piston (+.080 for GX390) with standard compression height. Use with +.040 rod for maximum compression. Pistons have valve reliefs for high-lift cams to fit both Honda & Hemi heads. Valve reliefs fitted for 38mm intake, and 34mm exhaust valves, but can be clearanced to fit larger sizes.
- Bore: 90mm (3.543")
- Clearance: .0025" (@ .850 down from oil land)
- Pin Height: .050" lower than stock for stroker cranks
*Wrist pin and clips included. Rings not included.
