Alum Cyl Head CNC GM LS1 65cc A/P 225cc Bare

The Trick Flow Alum Cyl Head CNC GM LS1 65cc A/P 225cc Bare is a precision-engineered aluminum cylinder head designed for high-performance Gen X LS-series engine builds. Built for enthusiasts and professionals who demand maximum horsepower and torque from their GM LS platform engines, this bare casting provides the foundation for custom engine combinations requiring superior airflow and combustion chamber efficiency. The 65cc chamber volume paired with a 225cc intake port delivers the geometric optimization needed for serious performance applications where stock or semi-finished heads fall short.

This CNC-machined aluminum casting features a 2.055-inch intake valve and 1.575-inch exhaust valve configuration, maximizing breathing capacity for high-RPM operation. The 1.300-inch valve spring pocket accommodates performance-grade springs and retainers without modification, while the angle-plug design optimizes spark plug positioning for improved combustion consistency. At 33.23 lbs per head, the lightweight aluminum construction reduces reciprocating mass, enabling quicker throttle response and higher sustained RPM capability compared to cast-iron alternatives. The bare casting format allows builders to specify their own valve train components, rocker arm ratios, and pushrods for complete drivetrain customization.

Engine builders, restomod shops, and dedicated performance enthusiasts benefit most from this bare head casting, as it permits full control over final assembly specifications and allows integration with aftermarket fuel injection, turbocharging, or supercharging systems. The 225cc intake runner is compatible with tunnel-ram, single-plane, and traditional intake manifold configurations common in LS-series engine swaps and racing applications. Installation requires professional machine shop finishing and valve train assembly; this product is sold as a bare casting and is not ready for bolt-on installation.