header pipe.......

[WB450r]

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

[m.h.s.c.#527]

get the pipe pro circuit sells for it it will fit best and u will get about as much gain as u did when u put the slip on on and u will need to rejet

[WB450r]

aight THANX