When creating our new valve line we set out to create the best performance longest lasting valves available to the aftermarket. Using advanced 3D design and simulation programs we have created a stronger and higher flowing valve head design. We flow test prototype valve heads in the specific applications to make sure we have the highest flowing valve head available on the market today. With the materials used we have less valve distortion at the face than any of the tested designs. Less distortion allows or better sealing under extreme conditions and more consistent performance threw the life of the valve. GSC Power-Division's new valves are sure to become the industries standard for sport compact performance valves. Valve Features•Swirl polished heads for smoother air flow over the valve•Back cut to reduce valve weight for higher rpm, higher boost pressure and allow for more aggressive cam profiles without increasing valve spring seat pressures.•Valve stems are micropolished to allow for less oil retention on the stem which creates less drag on the stem to guide for a smoother motion.•Fully nitrated ( this includes the 45 which increases valve life and makes a better seal at the valve seat for improved cylinder pressure) also reduces carbon buildup on the backside of the valve.•Intake valves are a modified 21-4n stainless and Exhausts are a modified 23-8n stainless material for high heat capacity while maintaining longevity. •Valve tips are either hardened or have a stelite wafer tip fused so that the tip is within 5 Rockwell C of the rocker or valve tappet for extended life and less wear•Valve tip lengths. We have taken extra time to adjust tip heights on the applications to require less tipping of the valve to maintain proper tip height for proper valve train geometry, and to cut down on install times when setting valve lash. •We have also adjusted the Keeper grove to properly balance intake and exhaust spring pressures to reduce the use of valve spring shims and maximize performance from our spring and retainer kits.•Valves will work with an oem keeper/lock or when available our upgrade keeper/lock. It's not mandatory but it is suggested that any valve lock not be reused on performance applications do to material grooving.
Upgrade your Mitsubishi Evo 9's performance with the GSC Power Division Intake Valve Set. These intake valves are precision-engineered for the 4G63T engine, featuring a diameter of 34mm in standard size. Crafted with a dazzling chrome polished finish, this set of eight intake valves ensures not only optimal airflow but also enhances the engine's durability and resistance to wear.The GSC P-D intake valves are built to withstand the demands of high-performance driving and motorsports. Their design improves the throttle response and engine efficiency, making them an ideal choice for enthusiasts aiming to extract the maximum potential from their engine. Each valve is manufactured with quality materials and precise craftsmanship to meet or exceed OEM standards.Perfect for tuning projects, hot rods, and kit cars, these valves provide reliable operation and come ready to install. Whether you're upgrading your engine components or building a high-performance motor from the ground up, this set of GSC intake valves offers dependable performance and quality you can count on.Experience faster throttle response, enhanced airflow, and improved overall engine performance with this high-quality valve set tailored specifically for the Mitsubishi Evo 9 4G63T engine. Make your next engine build a standout with GSC Power Division parts from Tuningsupply, your trusted partner in European automotive tuning.