I'm trying to decide on an exhaust for my 05 636. I called a dealer that does custom dyno tuning and they said lately that two bros exhaust quality has gone down and the carbon fiber starts to loose its original look after about six months. Has anyone had a problem with there two bros exhaust? He recommended the M4 full exhaust because it has been producing the most horsepower on his dyno. Any comments would be greatly appreciated because i am itching to get the stock can off and get this thing tuned.

 

i have had my bike for a while now and the carbon is fine. The sound is great. Me love my 2bros.

 

my cf on my two bros is doing fine also.

 

Let me guess, the m4 is also happens to be more expensive as well?

I have the carbon, and it still looks good as new and I bought it last summer.

 

i was thinking that aswell.

 

Either that or he's trying to offload the M4. I would go somewhere else to buy the pipe and dyno it. Or you can tell him to try both pipes and you'll buy the one that produces the most power. LOL.

 

so far so good on my two bros/ exhaust

 

I like the 2 bro's exhaust but i love my Akraprovic exhaust too. looks good and sounds good too. take a look at my pictures in my gallery.