i changed the filter and put a cone filter and then just put a mopar blowoff valve. now my car spikes at 17 psi and stays at 15 psi all the way. or itll spike at 15 and stay at 15 psi. is that good. or bad. it pulls a hell of a lot stronger cause the stock gt mustangs would lose buy a car or two now they loss by like 3 to 4 cars. hwlp me.