For more than 35 years, the COMP Cams mission has never changed: to produce the highest-performing products possible, provide customers with superior service, and to lead the industry in technological development. PN: 941-16 Number of Springs Per Valve: Single Outside Diameter of Outer Spring (in):1.255 in. Coil Bind Height (in):1.130 in. Damper Spring Included:Yes Spring Rate (lbs/in):441 lbs./in. Inside Diameter of Outer Spring (in):0.871 in. Valve Spring Style:Standard Coated:No