SRT. I'm sure you have realized that by the time you pay to have it properly installed and for the HP gains you will get, you could have had an SRT... and at least a 3 year 36k mile warranty. If you are close to Georgia, I'd recommend you contact a company called The Speed Factory. They perform warranty mods like superchargers (The SMS is one they offer). Maybe they can perform the work and leave you with a warranty.