So I bought a 2000 Mustang GT, automatic with 150k miles. I pretty much immediately noticed that it felt unusually slow, the fastest I’ve been able to hit is just over 100, my friend claims he was able to hit 115-120 in my car. It is not stock, I bought it with a cold air intake and straight piped. I changed the spark plugs and fuel filter, i had the P1309 code so I replaced the camshaft and crankshaft position sensors and the code went away. Im thinking its either a transmission slip or the car isnt tuned properly, does anyone have any advice?