Originally Posted by al335i
Great advice.!!! I think I'm just going to wait...
When I was looking to purchase, there were several new models on the lot that the dealer had already installed the M exhaust.
Don't want to burst any bubbles, but, the proposed mods are not going to bring much in the way of increased hp.
Both of the proposed mods are simple bolt ons. There will likely be a difference in sound but increased hp is minimal and something I doubt you will notice.
For these reasons: why wait?