Re: 2004 mustang Gt automatic 40th anniversary
How much HP? Did you add headers with the exhaust mod, and what is the exhaust mod.
The main thing you do to an auto to add horse power is increase the flow through the the engine. The addition of a cold air intake and increasing the size of the exhaust pipe and exhaust manifold (which includes a freer flowing catalytic converter) is a good start to get it a little quicker than normal, better gas mileage, and not a lot of bucks, all things considering. How far do you want to go and how much do you have to spend?
Prius repellant, just add gas.