Can a 2007 zx6r aftermarket slip-on exhaust fit a 2006 636???Is there any modifications that need to be done? An example of this was a guy on another kawai forum saying that he put a 07 zx6r scorpion slipon on his 06 636 and everything fit fine with NO modifications....I actually sold my Dual black series 2bros and I bought an M4 undertail slipon meant for an 07 zx6r...Any input will help to get a head start before it comes in from delivery, regardless Im putting this M4 on my 06 636 whatever modifications I need to do!