Manley Performance Valve Springs, Dual, 1.650 In. Outside Diameter, 635 Lbs./In. Rate

These Manley NexTek valve springs are better-designed valve springs using state-of-the-art machinery for purpose-built racing engines. They're manufactured from super-clean, high-tensile chrome silicon steel and are shot-peened to MIL specs for maximum fatigue life. They feature a proprietary, multi-step heat-treating that minimizes load loss and have computer-aided modeling to minimize valve bounce and valve gear separation. The Manley NexTek valve springs are smaller diameter and lightweight, allowing engines to rev higher faster. They have an extended tip thickness designed to eliminate overload breakage, and their tightly controlled open-end flatness reduces valve stem side loading.

• Number of Springs Per Valve:Dual
• Outside Diameter of Outer Spring (in):1.650 in.
• Coil Bind Height (in):1.105 in.
• Damper Spring Included:No
• Spring Rate (lbs/in):635 lbs./in.
• Inside Diameter of Inner Spring (in):0.855 in.
• Valve Spring Style:Standard
• Valve Springs Coated:No
• Quantity:Sold individually.