Well, I am new to this board and I am also building my first BMW. I have a 1983 533i. I have been building it for the last year and a half. So far I have Brembo brakes, Mintex pads, Racing Dynamics sway bars(Front and rear), Bilstien shocks and struts, Eibach Springs, K&N filter cone, 16in Mille Miglia Emotion wheels, Wings West Touring Nose, GT style spoiler, Mk2 flush rear bumper, GT sideskirts, DTM exhaust(straight pipe with a tip). I have replaced just about everything under the hood you can imagine. The car is currently waiting for a little more body work and a paint job before it goes down the road as a daily driver. I know that the 533i is a relatively quick car(I haven't taken my down the road more than 5 miles since I bought it). I was interested in finding a low boost turbo or supercharger setup cheap(one where I would not need to change and engine management systems or fuel injectors). I have seen some units priced around $5,000.00- which is just too much for someone in my position to spend. Links to any and all sites of manufacturers of these systems would be greatly appreciated. Thanks