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Valve Springs/ Titanium Retainers, Nex Tek, 1.640 in. Outside Diameter, 647 lbs./in. Spring Rate, Kit

Manley NexTek valve spring and retainer kits are designed and manufactured for optimum consistency, run after run, lap after lap. They are manufactured from super clean high-tensile chrome silicon steel that has been shot peened to MIL specs for maximum fatigue life. Proven to have less load loss than many other springs, they exhibit superior fatigue life and enhance valvetrain stability--everything that counts in winning races!