The 2.8 liter engine is a true v-6 engine with two seperate heads. the one in the jetta is the 15 degree v6, so they are two totally different engines so I doubt that much would fit without a lot of fabrication.
hope this helps,
Sam
I dont know of any turbo kits for the older A4. There was a company making a supercharger kit for it, I dont know if they still do.You can check out the company that makes it by clickin here Most people go with the 1.8 turbo since there is so much more aftermarket support for it.
Hope this helps
Technician/Shop Manager
ASE Master, L1 Adv. performance, 25yrs experience, hi perf. specialty