Should I get a cold air intake with a sct remote tuner on my 2011 Mustang GT and gain about 40 horsepower or should I buy the rest of the pieces for the Borla Catback Exhaust. I already have the Borla mufflers and the car sounds great. The only thing that worries me about the intake and tuner is that if suddenly the engine does not work properly then the dealer might void my warranty because of the tune upgrade. I heard the catback system will also increase horsepower but I already have the mufflers which give it great sound so im not sure which upgrade to go with.. please let me know what you think. thanks alot!