Howdy guys im only new to this site and i would like to say, HI there TT. I'm not sure if i am in the right section of the forums, but someone will be able to steer me in the right direction. What I'm asking is if a pro circuit t-4gp full system made to suit a 06-09 yz450, would fit onto my 2007 wr450. As im looking around for a new system and i have came across a second handy in good condition. If you guys think there is a better system out there to suit me, (I manly ride woods and around the river), I would love to hear. Any help would be great , Steve.