I'm kinda new to the Audi scene. Recently purchaced an 01 A4 1.8T with a broken timing belt. I replaced belt, tensioner, W/P, new valves & head job. All by myself! I'm the service manager at a mech garage, not a tech. Thank you Mitchell 1. Anyway, the car runs good but needs more UMPH. I'd like to start with the turbo and exhaust. Basicly what I'm looking for is Intelligent Input from some one with experience in this specific area. And... This looks like a great place to start. Ive read the Frankinturbo article here, very informative. Other information would be great.