JE Pistons Small Block Ford (20 Degree Head) 4.030 Bore / 1.600 CD / -5.00 CC - Set of 8

Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applicationsProprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pinRing groove design placement proven to maintain positive seal in high-HP, boosted applications, along with stout top land thickness for improved strengthLow-friction skirt coating reduces wear and reduces operating noise while optimizing performanceIncludes high-quality wrist pins, locks, and JE Pro Seal premium piston ringsAccumulator groove helps reduce pressure from combustion gases, reducing ring fluttering and improving ring seal for consistent powerMade 100% in the USA