TODA Racing campulleys allow precise adjustment of camshaft timing. For added accuracy and longevity, the timing marks are machined into the metal, not painted on or silk screened. The campulleys also feature the most accurate timing adjustment system on the market. They are constructed from 7075 aluminum for optimum strength and light weight. Differing form conventional sintered pulleys (one piece),the TODA adjustable cam pulley is made in two pieces. Duralumin A-7075 is used for both its lightness and high rigidity in both the inner plate and the cam pulley. So implementing an improved design and the employment of Duralumin a 35% weight reduction is achieved.