Quote Originally Posted by cogdoc View Post
I'm "about" to do the same thing, but I've been saying that for several weeks now ( lack of play time! ). The stock pipe is mandrel bent at 2.5" and it would flow pretty well. Then again you can never oversize a turbo exhaust. Thing is the MAJOR restriction is right next to the turbo, the DPF particulate filter. Upping the pipe size and leaving that in place is a waste of time and money really.

Nearly all the aftermarket "cat" (DPF ) back exhausts available delete the huge rear pancake muff. I am going to do that for sheer weight savings alone! I'd consider replacing the rear axle area resonator if it turns out to be restrictive, with a nice flowing Jap one, but I'd hazzard a guess that's not going to be necessary.

My vote would be cutout the big rear one, as it'll be cheap and quite easy for a shop to do, and see if the car feels any better. Go from there!
Do it!

It's called a Mufflerectomy.

I did it to my Mk3 TDI back in Oct 2006 the night before Drag Warz.

Sound is Tough and not loud by Milo tin standards.

My TDI now rev's quicker and easier.

2.5in Stainless Mufflerectomy: