Nuke Performance adjustable cam pulleys allow for fine tune adjustments to cam timing to maximize performance. Adjustments can be made to tune an engine’s power band to an optimum RPM range for different applications. The pulley is CNC-machined from 6082 aluminum alloy and hard anodized for long life. Three M6 bolts are fastened with helicoil inserts for long durability. There is also hard washers to make sure the pulley do its job on the racetrack or drag race and do not lose your tuned settings even under hard pressure. Tightening torque is 17 NM. For use on Volve 8v / 16v engines.