Updated with exhaust comparison video straight from Dinan:
Hey guys, I just watched this video of Matt Moreman of Obsessed Garage touring the joint Dinan and APR facility. Fast forward to about the 30:32 mark, and you will see an example of the Dinan exhaust for the M2C..
Moreman seems fairly impressed with it, but he never liked the stock sound on his F80. I'm not sure how some of you feel about Dinan but, I think it sounds really good.