If I were you - I would purchase a turbo kit from Greddy. They are name brand, and i've heard a lot of good things about their turbo kits. You can go to their website and check them out, they are built so that you can keep your A/C and P/S. I think they use the 15G turbo too - so its pretty small, but gives you power very very quickly if you go with..say a t3/t4 or similiar turbos you will experience turbo lag. If you want to - you can also check eBay...BE WARE THOUGH. Lots of cheap knock off's on eBay. However, I have found Greddy kits on eBay with a buy it now price of $1,000.00. and its legit. if you dont like doing from Greddy's main site or eBay...You can always build you own kit..which I recommend...thats what I did, and I love my setup! but - there are many way to go about keeping your AC/PS. hope I helped