What changes do I need to make on a 2004 Mustang GT to install factory Saleen supercharger?
If the supercharger is a bolt on, then you need to make sure of a few things. One is going to be your exhaust. Make sure that the exhaust piping is large enough for the psi output. You may need to change your computer at a dyno due to a difference effecting sensors. If you place a supercharger in your car, I would definately place a cold air intake in as well.