Hello guys first i want to say i am new to this forum and greet all the mustang community. Now to the question i am looking to install a steeda cold air intake and get the tuner from their website, but before if anyone knows is it really worth it to change my american racing intake and tune from the factory? Would it really make a difference in hp gains? As i said before the car came with a factory tune rated at 315hp 325tq.