get the car up on the lift and buy a different ring and pinion setup to give you a numerically lower number than what you have now. if you dont understand that if you have a 4.10:1 your drive shaft spins 4 times for every 1 wheel rotation, while a numerically lower ratio like3.1:1 the shaft spins 3 times for every one rotation of the wheels. any way back to business, if their stock or a decent quality after market ring and pinion, your gears will be expressed on the ring gear with the number of teeth on the ring:the number of teeth on the pinion (21:10, 35:14 etc.. etc) take the two numbers you find devide biggest by smallest and youll get your gear ratio.