I have a 97 Mustang Gt with a K and N filter without the airbox, and a roush intake (well its not really a roush intake its just the tube that goes from the air filter to the manifold), and i have the air silencer removed, thats basicly all i have on my car. So do you guys have any estimates at what my cars bringing out at the crank and at the wheels, also do I have any chance vs a z28?