I need to adjust the speedometer on my 84 GLi, its about 20 km/h over actual speed. is there a way to adjust this or an i hooped?
Hooped? Yes the speedo can be recalibrated but it's not something you can do in your garage. I can give you the name of a guy who does basically nothing but VW speedo's, but I don't have it right now. I'll get back ASAP.
And I'll be damned if I can find it. Here's another place I have personal experience with. The website has lots of good info and will point you in the right direction. Good luck.