Back when the 1999 Ford Mustang Cobra's came out they were rated at 320hp. Dyno testing revealed that the car was only producing 280+ HP at the motor. Many people who bought the car and had it dyno tested filed suit against ford motor company. This suit lead to a recall, in which they ended up replacing the intake, exhaust and flashed a new program to the. Basically what I am saying is if it wasnt for teh Dyno testing, Cobra owners would never have known that they were not getting what they paid for...... So a warranty Should and Would NOT be voided........