JE Pistons JEP182037 400 Series Dome Pistons

400 Series Dome Pistons 23deg Inverted Dome. Ultra-Light Gas Ported. Set of 8. 23 Degree Dome, Solid Dome Design, Oil Rail Support is Included, Recommended RingSet: J10008-4165-5. Block Height: 9. Bore: 4.165. CInside Diameter: 422. Comp Height: 1.062. Comp Ratio at 58cc: 14.4:1. Comp Ratio at 64cc: 13.3:1. Comp Ratio at 76cc: 11.5:1. Dome Volume: 3. Gram Weight: 464. Oversize: 0.04. ROutside Diameter: 6. Stroke: 3.875. These high-compression pistons are compatible with most aftermarket 23º heads and are ideal for drag racing and circle track applications. Valve reliefs will accommodate oversized valves and long duration, tight lobe separation cams. Precision CNC ring grooves are designed for 1/16", 1/16", 3/16" rings. Will not fit Pro Topline or Brodix 11X cylinder heads.

• Contact reduction grooves
• Double pin oilers

• Bore: 4.165"
• Comp Height: 1.062
• Comp Ratio @ 58cc: 14.4
• Comp Ratio @ 64cc: 13.3
• Comp Ratio @ 76cc: 11.5
• Dome Volume: 3
• Gram Weight: 464
• Oversize: 0.04
• ROutside Diameter: 6.000"
• Stroke: 3.800"
• Weight: 14.23 lbs