My Friend has a 81 VW Rabbit. It has a newer jetta motor and is turbo. I turnd the pump up 5 months or so ago. Aney way he just got 2 1/4stright pipe in it and I mean It will smoke like a fright train, I am jellous I think it smokes more than my truck. But I love it seeing a rabbit smoke, just gets me off Oo. Next is a intercooler and boost guage!!! Aney other tips On bombing a VW rabbit with a pump like a first gen but smaller is helpfull. Thanks Justin