Quote:
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.
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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."