I had read great reviews about USP, so I decided to take my GTI for a couple of repairs, and to upgrade my APR stage 1 with a turboback exhaust, and an air intake. I was advised to change various parts that were necessary to get the car back into top shape. Riding on my way back, the car handled much tighter, the acceleration is monstrous. Up to now, the car feels completely renewed. The exhaust is a bit louder than I expected, but it's no problem, its a hell of an exhaust note. Thanks for your great service and for getting my car back to being a true GTi.