its easier and cheaper to go with changing the front. any brand is good. if u want top speed add a tooth, u want acceleration and crappy top speed drop a tooth. stock in the front is 13. so 12 will give u good accel, 14 will give u top end. now im pretty sure this is how it goes. i told u the opp before but this is how it is. almost positive. unless u have a pipe, i wouldnt try to change ur gearing tho for tope speed, u might not be ablt to pull it well.