07 450r exhaust

[quadrider08]

Hey im gettin an 07 450r and i wanna put a pipe on it soon after i get it and i was curious as to what to get. It cant be too loud but i want the most power, mostly low end, possible

[wanna_be_ridn]

fmf factory 4

[john.E.business]

yoshi rs7 apparently really quiet and pulls hard...