i have a 2001 mustang gt and i wanna put some horsepower in it without going crazy to the engine...the car still has a warranty and i don't want to do anything to it that will void out the warranty. i was thinking about getting the regular bolt on stuff like the plenum, tb, cold air tube, and mass air, but a friend of mine says it wont help much and ill be wasting my money. i just wanna know what i could do to make it a little faster for now without voiding my warranty....need advice.