FEULING PARTS M8 Valve Spring Kit - Without Titanium Retainers - Part 1107

Valve Spring Kit - without TI Retainers - M8 Upgrade your V-Twin engine with the FEULING PARTS M8 Valve Spring Kit, part number 1107. Designed for direct bolt-in installation, this kit requires no machining or rocker box clearancing, ensuring a straightforward upgrade process. Crafted from premium-grade high tensile chrome silicon single-conical ovate wire, these springs provide exceptional strength and durability. The shot-preened surface, combined with a specially processed thermal heat treat and super NexTex® finish, enhances fatigue life to meet the demanding conditions of high-performance engines. This comprehensive kit includes Endurance Beehive® valve springs, machined spring seats, seat shims, valve locks, and Viton® valve seals, making it a complete solution for performance enthusiasts. Made in the USA, the springs support up to 0.565 inches of lift, with varying seat pressures tailored for optimal valve operation and longevity. The specifications detail a seat pressure of approximately 134 pounds at 1.375 inches installed height, decreasing as lift increases, ensuring reliable valve control across a wide range of cam profiles. The open height reaches 226 pounds at 0.970 inches, with coil bind at 0.920 inches, providing ample margin for high-lift cam setups. Cam measurements are based on a 0.050-inch lift with a 1.61 rocker arm ratio, designed to fit stock 6.00 mm valve stems with triple grooves. This kit is ideal for those seeking a robust, reliable upgrade that enhances engine performance and durability without the complexity of additional modifications. Features: Direct bolt-in replacement requiring no machining or rocker box clearancingMachined from premium-grade high tensile chrome silicon single-conical ovate wireShot-preened with thermal heat treat and super NexTex® finish for improved fatigue lifeIncludes Endurance Beehive® valve springs, seats, shims, locks, and Viton® sealsSupports up to 0.565 inches of valve lift with precise seat pressure ratingsDesigned for high-performance V-Twin engines with stock 6.00 mm valve stemsMade in the USA for quality assurance and durability