Alpha manifolds are built for the abuse of off-road; yet are elegant enough for any street car. AFI turbo manifolds are fabricated from high-carbon .150" wall steel. The flanges are laser-cut HRP & O high carbon .375" and .500" steel. Proprietary manufacturing processes ensure optimal ductility, accompanies by superb dimensional stability. The result: OUTSTANDING durability in the high-heat, high-vibration environment of off-road turbocharging!
Alpha manifolds use standard T3 turbo flanges and stout 3/8" x 16 flange fastener holes. These are built in both internal and external wastegate configurations for your turbocharging needs. The external wastegate flanges are welded for 38MM TiAL Wastegates.