Custom exhaust on my 4.2 A6
 

well didnt like the look of the stock exhaust so took it to my exhaust guy and had him put a full custom exhaust on. It starts with high flow 2.5 in and out magnaflow cats into 2.5 dual pipes into a custom 4 in x-pipe. Then it seperates into 2.5 out throught dynomax superturbos. Sounds GREAT and runs nice as well.

Nice! Have any videos of it? Do the manaflow cats
Do those magnaflow cats trigger a CEL, or are they clean enough....

Also, did you have pre-cats up right after the manifolds?

Any tips, or just the mufflers...