I have an '08 Ford Mustang Roush (Stage 2) with the following: 4.6 Ltr. V8 supercharged by Roush. 18" Roush Chrome Rims. 275/40/ZR18 Nitto NT555 High Performance Tires. Chrome Flowmaster exhausts, Side Scoops, Hood Scoop, Cervini Pedestal Spoiler, High Intensity Lights, and Steeda Cold Air Induction. 480 Horses, RWD, 402 Horses to the rear right off launch. Its shy of 500 horses some, which is where i want to get it. I bought it recently as is. What suggestions do you have in which i can raise my horses to at least 500. Thanks for all help in advance.