EV8 Stainless Steel Exhaust Valve

The Supertech TEVN-1052F is a high-performance exhaust valve engineered to enhance engine reliability and longevity. Constructed from EV8 stainless steel, it offers excellent hot hardness and durability, ensuring consistent seat-face accuracy and stem concentricity even under demanding conditions. The Black Nitride (BN) surface treatment provides a hard, low-friction finish that significantly reduces wear and scuffing, promoting smoother operation and extending the service life of valve guides and followers. It is also suitable for moderate boost applications, offering reliable sealing and performance. For sustained high exhaust gas temperatures or endurance racing, Supertech recommends considering their Inconel exhaust valves. Supertech offers this valve with OE diameter and oversize options, catering to stock ports and chambers as well as ported heads. The valve head shapes are available in flat, dished, and tulip designs, depending on the specific application, and come with undercut or straight stems as validated. For optimal performance, it is recommended to match these valves with compatible Supertech springs, retainers, and performance guides. Proper installation is crucial for maximizing the benefits of these valves. This includes measuring guide ID to set stem-to-guide clearance, cutting seats to correct angles and contact width, verifying concentricity, and checking installed height, seat pressure, coil bind, and retainer-to-seal clearance. It is also essential to verify piston-to-valve clearance at the intended lift and timing.