Theres a few ways for under a buck. deffinatelly visit ebay and shop around. Cone intake filter replacing the airbox, $25 ~ 8hp + more torque and faster throttle. Bosche+4, $35 ~8hp + more torque. Adj. Fuel Pressure, $40 if used with more air and hotter plugs to burn more fuel, ~3hp @+3psi but a free flow exhaust is also helpful. Free flow muffler, $40 ~8hp + less torque and faster throttle and ricey sound. Ground Kit, $30 ~2hp + better throttle and accessories. If you dont just want to go straight, get some strut bars, and you can take turns faster. then if you want to spend more money, you can get even better power gains. Good Luck.