I recently purchased a used fmf factory 4.1 titanium exhaust which supposedly came off an 09 yz 450f to put on my 06 yz 450f. when i got it home, I tried to mount it and it wont work. The mounting bracket on the pipe will not line up with the subframe, its about 2 inches off. i was thinking about drilling out the rivets on the mount of the pipe and relocating the mount so it will mount into the subframe. My question is, since I dont know what bike this came off, is it safe to mount on mine if I get it to line up correctly. Since im going to relocate the mounting bracket, what should I do about the holes, welder (its the titanium one) or is there anything else out there. When i got it, there was no midpipe so I had to purchase a new one directly from fmf so Im ok there. dont know what to do, any help would be great. be careful what you by on the internet, I know I learned my lesson Thanks.