Do a search on exhausts and you'll get tons of answers about Dinan and almost every other exhaust out there for your M. Check out www.klangford.com to hear different exhausts, etc. on your car.
Personally, and speaking from my own experience only, the Dinan exhaust does not sound as good as other exhausts I've heard out there or offer any suitable reduction in "back preassure" from any other brand. . . don't let the marketing and sales fool ya.
Good luck on your decision!!
Last edited by Elyas; 01-28-2006 at 10:27 PM.