I have a 03 600RR and am in the market for a slip-on exhaust, I either want an Akrapovic or a Two Brothers. I was wondering if anyone knew the difference between the Two Brothers M-2 V.A.L.E. slip-on and the M-5 V.A.L.E. slip-on systems. I am leaning more towards the Two Brothers over the Akrapovic due to the deeper throatier tone they have. But I am open to suggestionsif anyone knows anything about any of these exhausts all information and help is appreciated.
Thanks again...

 

M2 is smaller than the M5. For what you have get the M2, M5 is more for the litre bikes. I've got a 2Bros and it's badass, you won't be dissappointed.