The 123ignition VAG-4-R-V is developed to replace most distributors as used by VW and Audi in the 8 valves Golf, Polo, LT and Audi 80, 100 (please check the picture for dimensions before ordering). The 123/VAG-4-R-V does not have a cog wheel. You can either use the cog wheel of your old distributor (please change this carefully)