This 100% made in USA product delivers the best performance and great torque. It, however, does not fit LT1/LT4 or factory roller Small Blocks built from 1985 and newer. With over 30 years of camshaft designing and manufacturing experience, the company’s replacement parts never disappoint. COMP Cams CL12-602-4 is made in the USA by state-of-the-art engineering from Comp Cams.