H23 series Cast Manifold for the 92-96 Prelude H23, also fits on the F23A1 and F23A4 2.3 Accord F22a 90-96. High quality cast turbo manifold for those who are piecing together their own turbo kits. The manifold is AC and PS compatible. Manifold will work with any size turbo T3, T3/T4B, T3/T4E and up to the Turbonetics 60-1. Lifetime warranty on cracking. Treadstone manifolds are cast using a high ductile silicone based iron adhering to a strict ASTM casting standards. These manifolds are very durable and will withstand all the heat and vibration you can throw at them. Our manifolds casting exceeds OEM specifications and now come with lifetime warranty against cracking. All of our manifolds incorporate external 35 or 38mm wastegate, and either T3 or T4 standard turbine inlet. All internal surfaces are cast smooth for high flow and low surface friction.