Engine valve train timing plays a very important role in determining an engine’s power band. CAD designed & CNC machined from billet aluminum, Ralco RZ Adjustable Cam Gears allow for precise tuning of valve timing. Clearly marked with 20 degrees of advance and retard, the slotted type allows for easy adjustment. The lightweight construction and hard-anodized outer ring reduce wear. If you are looking for the best gears on the market, then a Ralco RZ Cam Gear is for you.