Supertech Valves Springs Retainers Kit Fits Subaru WRX STi EJ20 EJ25 EJ257 EJ255
Go Race Parts presents.. Our special on Supertech Performance Valves & Components! This listing is for a complete set of 16 Supertech STD Size Valves, 70LB Dual Springs, Retainers, Seats for. Subaru WRX STi EJ20/EJ25 applications. This listing includes Supertech part numbers. SIVN-1010 x 8 (intake). SEVN-1010 x 8 (exhaust). Head Diameter: 36.0mm (intake). Stem Diameter: 5.96mm (intake). Valve Length: 104.35mm (intake). Max Lift: 14.80mm. Coil Bind: 20.70mm. Retainer: RET-TS60-WRX1 + SEAT-TS-SUB. Valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for higher performance & durability at high rpms and better memory. Computer designed to ensure that wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue for long durability under extreme conditions. Computer software also allows us to make sure that the harmonics are well under control. The Retainers are manufactured with high quality military certified Titanium alloy, CNC machined for a tight fit that will ensure a long durability. We apply more than 30 years of experience in the development of each and every Supertech racing valve we sell. Combine this experience with state of the art equipment such as ultrasonic tests, x-rays, laser measurement equipment, and applications like computerized Finite Element Analysis (FEA) and it is no wonder why supertech has some of the best performance products on the market. While this is more than most manufacturers we don’t stop there. We also do extensive testing working very closely with many of today’s top engine builders in order to continuously improve our products. All of this is meant to insure Supertech’s industry leading reputation for high flow rates, durability and uncompromising quality. Higher Flow Rates Our valves are not finished from generic blanks rather they are specifically designed for each and every application. We work relentlessly, testing and researching every aspect trying to improve the air flow of our designs. Durability With every valve design we strive to maximize durability through higher fatigue resistance and tensile strength. Each valve tip is hardened beyond 52HRc. Stem Super finishing In 2006 we introduced our stem Superfinishing as a standard addition to all of our valves and provided it at no additional cost. When our Superfinish is combined with our Black Nitrided valve it reduces the surface roughness to 1/3 of our chrome coated valve. The end result. Unsurpassed performance and durability. Strict Dimensional Tolerances It’s unlikely you will find any of our competitor’s valves with stricter dimensional tolerances than our Supertech valves. Combine that with finished seats with equally strict run out tolerances and you won’t find a better sealing, better performing and easier to install solution anywhere! International customers are welcome. We pride ourselves in the offering the best pricing and customer service on the internet!
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