Is there a turbo or supercharger kit for A8 96" ...im thinking of puting one or two in my A8 .it´s possible right.

what engine do you have, V6, V8 or W12. there is a kit V6 by PES. and other engines. V8 and W12 I never saw one. all you can do is coustom setup.
I'm making a kit for V6, but if AC is in the same place as on your engine it will be posible to use my kit on your engine.

i have the v8.4,2l engine

so its possible to put a turbo in my audi ,i think i have to customise the front bumber to make a intercooler fit

ye, a GT25 or GT28 by garret should provide you with enough bone crashing experiance.
But remember You can do only biturbo on V engines.

but dont i have to change my transmission if im puting a turbo in him,so it won´t brake

well if you have auto, then I dont recomend couse well thats be stupid. but if manual it will withhand increase of 100% max in my opinion, clutch on the other hand clutch will go aS HIGH as 50% increase.
on auto you will not feel as much increase as on manual. you can do Levelten update on it and you will be able to push higher.

What do you have???

i have the 4speed automatic/triptonic transmison 4,2l V8

ye it should be good.

on the page www.turbobygarrett.com ,it reads that if Displacement 3.5L - 5.0L and Horsepower 370 - 650 the GT40 is best for thad big engine so is gt40 better for my car....