I handed my car over to Hennessey a couple of weeks ago for the GT700 package, which basically consists of a pulley, tune, maf recalibrator, filters, etc. This car went from fun to AWESOME! I can't believe how much difference it actually makes! I loved the car in stock form, but I always felt like it was lacking a little power, so this was just what the doctor ordered! They took great care of the car, and it runs just like stock until you mash the throttle! I am very impressed with the results!!