Dual Valve Spring Kit with Retainers

The Supertech SPRK-M1015-EX3 Dual Valve Spring Kit is a precision-matched set for a complete valvetrain overhaul, engineered for performance enthusiasts seeking high-rpm durability. The manufacturing process includes a gas nitriding treatment followed by shot peening, significantly improving fatigue life. Key specifications include a seat pressure of 85 @ 34.50, an open pressure of 228 @ 11.5, and a maximum lift of 13.80mm, with a coil bind at 20.70mm and a rate of 12.1. This kit is specifically designed for the 2008-2015 Mitsubishi Lancer EVO X models. The package includes 16 springs (SPR-TS1015), 16 retainers (RET-TS55/T1EX), and 16 seat locators (SEAT-M1015-2). Please note that due to the nature of the application, these parts are sold without any express warranty or implied warranty of merchantability or fitness for a particular purpose.