I swapped to a full exhaust system yesterday...No big deal other members do it all the time...Well let me warn you on this...There were two things I was not prepared for clearance and that the header bolts were allen head...WTF...When I finally got the header unbolted I couldn't remove it from the bike because I had no clearance...No where to run...So I ended up with a small jack...That was scary...With no help and no other way to support the bike (high in the air and cocked to one side)...I carefully removed the header...The install on the aftermarket was not near as damning...So the morale of this story is...If you are going to change your exhaust to an aftermarket full system be prepared for the two issues I discussed...