State of the art technology is utilized to manufacture all world American brake camshafts. Shaft splines are machine rolled with heat treatment as the final step for long term reliability. All of our camshafts are inspected to OEM specifications. For the highest reliability and safety choose world American brand of camshafts and camshaft hardware kits. Midwest truck & auto parts, Inc. Was founded in 1946 as a military surplus supplier. Midwest supplies aftermarket and OEM manual drivetrain components for heavy, medium, light duty and performance applications.