Stem Diameter: 5.98mm (intake). Valve Length: 99.60mm (intake). 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 dont 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.We pride ourselves in the offering the best pricing and customer service on the internet! The item "Supertech +1MM Valves Dual Springs Retainers Kit For Toyota 4AGE 4A-GE 16V AE86" is in sale since Thursday, August 1, 2019. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Valves & Parts". The seller is "goraceparts" and is located in Miami, Florida. This item can be shipped worldwide.