I will be replacing my stock muffler on my 2.0T TT and was wondering if anyone had a good idea on how much flow I will need for the new muffler to allow for the best results? I am looking at a straight through muffler just dont know how CFM I need. Thanks.

 

For a turbo car, the more flow the better. A muffler with a perforated pipe is less restrictive than the mufflers with louvered pipes, but both flow better than chambered designs (like stock), other than that, I don't think there would be any issue with whatever you come up with.

 

Sounds good I just want to make sure I get one that flows enough but not one that flows more than I will use. Plus I want to make sure I get all the HP from it I can get. Not sure how much the stock one flows?