The 590hp kit from Roush is $7,500, which includes the supercharger, exhaust, graphics and headrests. And everyone is right, the 590hp kit is only warranted, if Roush does the work before the vehicle is sent to the dealership, which at that time, you pay about $15,000 for a Roush Raptor. I have a thread about a page back about my DIY install of the kit.