Isky SP Series High Endurance valve springs upgrade your traditional chrome silicon springs. When you need more than what your regular valve springs have to offer, SP Series valve springs from Isky take you to a greater level of endurance. They're wound with super-clean, high-tensile chrome silicon spring wire and are Spintron test-proven up to 8,000 rpm for 700 racing miles. Enhance the performance of your radical cam and/or moderately high rpm setup with Isky SP Series High Endurance valve springs.
Number of Springs Per Valve:Dual
Outside Diameter of Outer Spring (in):1.530 in.
Coil Bind Height (in):1.150 in.
Damper Spring Included:Yes
Spring Rate (lbs/in):440 lbs./in.
Inside Diameter of Outer Spring (in):1.005 in.
Inside Diameter of Inner Spring (in):0.730 in.
Valve Spring Style:Standard
Coated:No
Quantity:Sold as a set of 16.