for everyone out there looking to buy an exhaust for your 150 i would definatley say to go with the big gun evo x or the evo r I got the evo x about 3 weeks ago its sick my bike only has a rejetted carb air filter and i blow away my friend with a stock 150 on both top and bottom end
04' crf 150 big gun evo x, bbr skid plate, uni air filter, renthal handlebars, re-jetted carb