AFR Direct Master Warehouse Distributor - All AFR Products Available. AFR Part Number 1530. Custom order with 3-4 week build time. AFR's 215cc LSX heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings, Titanium retainers and high quality components throughout. Recommended for moderate street or street/strip builds with displacements up to 408 cubic inches, operating up to 6500 RPM. Requires minimum 3.900 bore size for intake valve clearance. Component upgrade and machining options are available to customize AFR Heads to your specific build. Note: INCLUDED AFR part #8019. The upgraded springs have higher seat and open pressures (155/410+) to better reduce the risk of valve float in…