Posting for a buddie. He has a Stage 3 Roush with exhaust and an cai. He looking to do some things to the car for some more power and is having trouble what to go with. I think i read somewhere that the roushcharger only puts out 4#'s stock. Just trying to help a fellow mustang buddy get his so called 380hp roush to actually feel that fast. I have another buddy with a gt and some bolt-ons that can pretty much beat him. Please help! He has $4,000 to work with!! Let me know!