[DTOAST3]

Hi, I am looking at aftermarket exhaust for my 328i with 2 exits out the back. I currently have the rear m sport bumper but there is only one cutout for the current exhaust. I searched but had a hard time finding concrete information so maybe this post can clear some questions up. The following statements are what i believe are options for installing an aftermarket exhaust with dual outputs. Can someone please confirm if i am correct please? Thank you!

1) Purchase a rear diffuser with dual cutouts
2) Cut a piece of the stock bumper to create a second exhaust exit location
3) Purchase a 335 rear bumper that already has the dual exhaust locations cut out

[rgolding]

So since you have a sport bumper, your only option is to cut it to make a hole for the exhaust. If you were to get the M sport rear bumper, then you can swap the diffuser to whatever you pick, a single exit or double exit.

[DTOAST3]

I apologize, i have the m sport bumper. I really appreciate your response.

[CandyRedRC46]

Swap the diffuser.

[rjd_F30]

If you have an M sport bumper you can swap out the diffuser with a 335i one.

[DTOAST3]

Sweet, thanks for the replies.

One more thing, Do you guys know if a M2 axle back muffler will fit on a f30? I know that hooking it up to the stock midpipe will require a little work but besides that, will the exhaust hangers and the valve line up properly?

[rjd_F30]

Originally Posted by DTOAST3

Sweet, thanks for the replies.

One more thing, Do you guys know if a M2 axle back muffler will fit on a f30? I know that hooking it up to the stock midpipe will require a little work but besides that, will the exhaust hangers and the valve line up properly?

Not sure, but if I had to guess, I'd say no, the hangers will not align.

[CandyRedRC46]

It probably won't be a direct swap, but it should be fairly easy for a competent exhaust shop to make work.