Mitsubishi 4G63 CNC Cylinder Head Our cylinder heads are developed on a flow bench and dyno tested to ensure significant   performance improvements. A tremendous amount of research and development is   conducted focusing on port design and valve seat angles to maximize volumetric efficiency. The development of a cylinder head port relies on several factors to truly maximize the   volumetric efficiency. Our primary focus covers the following points; correct valve size,   pressure recovery dynamics, proper port sizing, port mapping, wet flow, and mixture motion.   By focusing on these particular points we have the ability to develop cylinder heads that   not only perform experimentally on the flow bench but in real world racing applications. The quality and precision of valve seat geometry also is an area of great importance,    it determines how well the valves seal against gas pressure, how fast heat transfer away   from the valve head, and the rate at which the mating surface will wear during operation.   Aside from the thermomechanical factors, the valve seat geometry significantly influences    the gas flow behavior in a critical area for the gas exchange process. Our research   and development has determined that this area is responsible for approximately   35% to 40% of the port flow. Options:   Titanium Valves   Inconel Exhaust Valves   Bronze Guides   Solid Lifter Conversion   Billet Camshafts   O-Ringing Price: Contact Us