LSX 215cc CNC Alum Heads Mongoose 65cc

The LSX 215cc CNC Alum Heads Mongoose 65cc cylinder heads are a precision-engineered solution for builders seeking maximum performance from GM LS-series engine platforms. These assembled aluminum heads are designed for serious enthusiasts and professionals who demand superior airflow and combustion efficiency, making them ideal for street engines, track-focused powerplants, or forced-induction applications.

Manufactured by Air Flow Research (AFR), these heads feature a 215 cc intake runner and a 65 cc combustion chamber, optimized for steady, responsive power across the RPM band. The CNC-ported aluminum construction ensures consistent, repeatable geometry that factory castings cannot match, which is critical for reliability and tuning predictability. Equipped with 2.020-inch intake and 1.600-inch exhaust valves paired with 1.290 in valve springs, the assembly handles the thermal and mechanical stresses of modified engines while maintaining precision valve timing control.

The angle-plug configuration enhances spark plug accessibility and allows for optimized ignition timing, distinguishing these engineered heads from basic alternatives. Supplied as a complete, ready-to-install pair, these heads arrive assembled and inspected, reducing build time and ensuring high performance for your engine. They are compatible with GM LS-series engines, making them a versatile choice for a range of applications.