SBC 220cc CNC Alum Heads Eliminator Race 65cc A/P

The SBC 220cc CNC Alum Heads Eliminator Race 65cc A/P from Air Flow Research represents a precision-engineered cylinder head assembly purpose-built for Small Block Chevy race engines demanding peak performance and reliability. Designed for competitors and serious engine builders who require maximum breathing efficiency and repeatability, this matched pair delivers the kind of head flow characteristics that separate winning combinations from the rest. Whether you're building a bracket racer, street-strip hybrid, or all-out competition engine, these heads address the fundamental requirement of any high-performance platform: unrestricted cylinder charging and evacuation.

CNC-ported aluminum construction provides superior flow dynamics across the 220 cubic centimeter intake runner volume, optimized for mid-to-high RPM scavenging where race engines live. The 65 cubic centimeter combustion chamber geometry supports higher compression ratios while maintaining stable flame propagation and knock resistance—critical factors in supercharged or nitrous-assisted applications. At 68 pounds per pair, these heads offer significant weight savings over iron alternatives without sacrificing the structural integrity demanded by boost and peak cylinder pressures. The 1.550-inch valve springs accommodate aggressive cam profiles typical of race-grade mechanical or hydraulic roller packages, while the angle-plug configuration ensures optimal ignition positioning and superior thermal management around the spark plug seat.

These Eliminator Race heads suit engine builders targeting 400+ horsepower naturally aspirated platforms or forced-induction setups requiring room for air movement without compromise. The 2.100-inch intake and 1.600-inch exhaust valve sizing balances intake efficiency with durable exhaust heat rejection—essential when running electronic fuel injection or carbureted race fuel systems. Installation compatibility extends across all small block Chevy platforms from 262 to 400 cubic inches, provided supporting components (manifolds, gaskets, pushrods, rockers) are selected for this head's deck height and valve centerline geometry. Professional assembly and machine work are strongly recommended to ensure optimal gasket sealing, valve lash settings, and rocker geometry.