COMP Cams® takes all necessary measures to ensure our products are made from the best materials available. We even go a step further to see what is required to make the best even better. Fissures within the metal of standard spring wire, caused by molecular contaminants, are the weakest link in valve spring construction. These fissures appear to be immense under the Scanning Electron Microscope but in fact, are just microns wide. Diminishing the occurrence of these fissures in our valve spring steel is the COMP Cams® goal when selecting materials. The metallurgists at COMP Cams® scrutinize every piece of metal utilized in the creation of Elite Race Valve Springs to make sure they are of unsurpassable quality. Designed for use with roller cam. 750"+ maximum lift, 1. 625" O. D. Created with new processing techniques for longevity and reliabilityWidely used in Camping World Truck, Dirt Late Model and Sprint Car racingPit Stop USA offers Comp Cams Elite Race™ Dual Valve Springs w/ Damper - 1.549" O.D. - (Set of 16) 26115-16 at low everyday prices. Be sure to check out all of our products from Comp Cams including Comp Cams Elite Race Valve Springs.