[bimmercar]

I was asking dealer about getting a M Performance or Dinan exhaust installed.

I'm a undecided if I should keep stock exhaust or do M Perf or Dian. I would like a nice exhaust but not too loud to attract attention from neighbors and cops....

Any options?

[s1uma1]

I'm in the same boat. Trying to decide between Dinan and mp. Ultimately may go with mp bc of price...

[bimmercar]

Anyone think the stock exhaust is loud enough?

I will get my car in 1-2 weeks so I don't know how the stock exhaust sounds like.

The Dealer I talked to said I needed to install rear defuser too.

[DanG]

With the windows up, I couldn't tell the difference between the stock and M Performance exhaust. With the windows down, the M Performance exhaust has a nice throatier sound.

I haven't gotten anyone with a Dinan exhaust to tell me how it sounds.

[DanG]

Originally Posted by bimmercar

Anyone think the stock exhaust is loud enough?

I will get my car in 1-2 weeks so I don't know how the stock exhaust sounds like.

The Dealer I talked to said I needed to install rear defuser too

The M Performance exhaust has two part numbers: one with the M defuser and one without.

[gaijin]

Originally Posted by bimmercar

Anyone think the stock exhaust is loud enough?

I will get my car in 1-2 weeks so I don't know how the stock exhaust sounds like.

The Dealer I talked to said I needed to install rear defuser too.

As DanG pointed out, there are two different part number (with or without diffuser). The choice is yours.

"A diffuser, in an automotive context, is a shaped section of the car underbody which improves the car's aerodynamic properties by enhancing the transition between the high-velocity airflow underneath the car and the much slower freestream airflow of the ambient atmosphere."

[bimmercar]

thanks for the info guys... I'll ask dealer about it...

[Delnari]

I have enjoyed having my M Performance muffler over the stock muffler. It is really cool when inside a parking garage and watching everyone look up as I'm coming through to a parking spot.