I recently posted a question about exhaust for my '07 Wr 450 and it made me start looking at pipes. I like the Dr.D set-up but in the end, I think I'd just go with FMF (had good luck in the past). Looking at the headers, is it worth it to get the header pipe and if so, what's the difference 'tween the MegaBomb and the PowerBomb? Or...is there another set-up you guys might recommend. I've got a buddy with the Leo Vince and I didn't much care for the sound. It didn't sound much different than my stock pipe (baffle removed), which is super quiet.