OBX Red Adjustable Cam Gear Set Jetta VW 74-98 4-Cyl 8V Golf Engines CAD designed and CNC machined from lightweight 6061-T6 billet aluminum Advanced 5-bolt pattern to eliminate change of cam gear timing Allows for single degree adjustment to a maximum of +/- 10 degrees (advance/retard) Laser cut degree marks for easy reading and adjustment Hard-baked gears teeth prevent wear under the toughest conditions