Dual Valve Spring Kit w/ Titanium Retainers

The Supertech Dual Valve Spring Kit is engineered for high-performance applications in 4G63 Evo, DSM, and GVR4 engines, offering enhanced durability and reliability at high RPM ranges. Constructed from premium Superclean Chrome Silicon Vanadium Steel alloy, these springs provide superior performance and structural memory. The kit includes 16 dual springs, 16 titanium retainers manufactured from military-certified titanium alloy and CNC machined for a precise fit, 16 valve seats, and 16 reduced O.D. valve seals, providing a complete valvetrain overhaul. This kit offers multiple pressure seat options to suit specific engine builds: 80 @ 39.6mm, 92 @ 39.6mm, 100 @ 39.0mm, and 110 @ 38.1mm. Each option provides varying specifications for max lift, coil bind, and spring rate, allowing tuners to select the optimal configuration for their performance goals. For example, the SPRK-M1007D option offers a max lift of 14.90mm with a rate of 12.50 lbs/mm. Vehicle fitment includes the 1992-2006 Evolution I-IX, 1990-1999 Eclipse GST/GSX, 1990-1998 Talon TSi, 1990-1994 Laser RS, and 1991-1992 Galant VR-4. An important installation note specifies that some 1G castings may require different seat locators due to a taller valve guide boss. It is recommended to research all pressure seat options and consult an engine builder to ensure the correct selection for your specific application.