I have a '04 TDI with 5 speed. I put installed K&N Filter and am avg about 46 mpg combined city/highway. I have been searching high and low for an aftermarket stainless steel exhaust system. Anyone out there put one on yet? Brand? Recommendations? I want a turbo back 3" stainless if that is an option. This is with the thought of chipping the engine at a later date. Also wanted to know who makes the best chip for these TDIs? I am changing oil about every 2500-3000 miles and am trying to be as reqular as possible. Any other maintenance pitfalls? I love my Kermit! Replies appreciated.