WB450r
04-07-2007, 06:53 PM
i have an 05 450r and a pro circuit T-4 pipe tht ive had for bout a year......i was lookin at gettin a header pipe but dont no which one 2 get.......should i jus get the pro circuit header pipe or will a different kind work........and how much more hp will i gain.....and do i need to rejet after puttin on the header pipe.....and info would be great.......
THANX
THANX