2005-2009 Ford Mustang GT V8-4.6L, Tube Size 1-5/8" O.D., Collector Size 2-1/2", Black Paint, CARB EO D-115-19. Flowtech Headers are the perfect combination of quality and value. This shorty header fits the popular 2005-2009 Ford Mustang GT V8-4.6L and bolts up to the factory exhaust. 50 state legal - CARB EO D-115-19. The installation is very tight and requires raising the motor. Please review the installation instructions for more details.