[stephenf121]

Hello,
I recently purchased a 2007 335i with a proceed rev3 running a custom wedge tune. It has catless downpipes, upgraded intercooler, charge pipe, intake, etc, but it has the factory exhaust. The car runs awesome but i wish it sounded a little louder. If i were to add an exhaust (catback most likely) would it require a retune, or do you think it would be ok with out? What about doing the golf tee mod or modifying the stock exhaust like this http://www.e90post.com/forums/showth...light=golf+tee I searched around and couldn't find an answer. Thanks in advance.

[TheYuriPanda]

no.

[adidoman]

Exhausts past the downpipes don't do much in terms of performance on these cars, more for sound than anything else.

[stephenf121]

thanks for the responses. Sound is all I'm looking for, just didn't want to have to get a new tune made.