Originally Posted by Philip@McKennaPerformance
I just spoke with Dinan on the phone about the cutting. They stated that they follow BMW's exact specifications on mufflers. What that means is if BMW had to send you a replacement muffler there is a section on your old muffler that is marked where you would have to just cut it off and attach the new one.
So yes this exhaust requires you to just make one cut on your existing one and then attach the Dinan exhaust to it with the clamps provided. They stated it was done like this because these are BMW's directly guidelines on replacing a muffler.
Understandable as long as the client is informed well about this beforehand and is willing to cut the stock piece. There is a good deal of peace of mind in just taking the stock muffler out intact, putting the new one in and keeping the stock in your garage, I mean in case you may want to put it back or sell the car in absolutely stock shape and sell or use the new exhaust separately...like most people here prefer to do as far as I see.
"The mark of a great car is one whose overall competence exceeds what you should expect from its individual components and the 1M does just that", Chris Harris.
2011 BMW 1M: TECH: Evolve Race+N55mids, Evolve IC, Michelin PSS, ER cp, aFe filter, CDVx, Vorshlag camber plates, P3Cars, OCC EXTERIOR: trunk spoiler, blacklines, black grills, IND goodies INTERIOR: Alcantara steering wheel, steel pedals, custom mats, MPower e-brake.