Just got 09 700xx and I like the two brothers slip on for the 06-07 gsxr set up. So my question is, is the stock 700xx header pipe the same size as the slip on?? Is there a aftermarket header that I can use with the slip on?? I'm pretty new to this so I guess I would like to know what all I need for this set up to work and I've done some research and there's the v2 and the m2. Which one is the one that fits?? And will any of the black series fit?? Thanks guys!!