These precision machined billet aluminum caps will really change the look of your engine bay. They come in a machined finish or in black anodized. The MK3 coolant cap fits over the factory cap and is secured by a set screw. These are custom made by our friends at Jcaps in small batches in California, USA. These fit all MK3 VW Jetta/Golf/GTI, B3 and B4 Passat, Corrado, Cabrio, and Eurovan.