Who better to improve a valve than the manufacturer of the TA Stage 2 Aluminum Heads! Our Severe Duty stainless steel valves are nearly twice as strong at operating temperature as most import valves. They offer increased durability, extended service life, increased flow and lighter weight than stock valves. Key features such as a swirl polished backside radius, undercut and chromed stems, laser impregnated hardened stalite tips result in a higher flow and lighter combination compared to other performance valves, all while maintaining the utmost in durability. Our 3/8” High flow valves work with all other stock spec. components.