Well i would have too say im pretty happy with the fmf powercore4 and the fmf jet kit and it comes with a header pipe, cause it sounds good and gives me the power that i need but i dont know what kind of riding you do but for me like dunes and mainly trails it's a awsome pipe hope this helps

 

mu buddy has a full system yoshi on his 300e and he loves it . he says it gives him plenty of power and he rides trails and hill climbs. but thier pretty pricey

 

yea i just found an hmf with a jet kit for $250 and i m getting a k&n with an outerwears wrap for christmas so i might get that white bos head pipe to if i got enough money left over

 

you may have to grind on the header a little bit. I dont rem. if my friend had to do it or not. But i do know it works.

 

ok thanks for the help