MagnaFlow has a variety of 2003 Ford Mustang catalytic converters that meet California Grade, HM Grade, OEM Grade or Standard Grade requirements. Keep your pony car emissions-legal and make sure the check engine light stays off with this vital exhaust component. Each converter features durable stainless-steel construction and either a direct-fit or universal design compatible with Base to SVT Cobra 10th Anniversary trim levels equipped with the 3.8L V6 or 4.6L V8 engine options. Select your ’03 Ford Mustang’s specifications and state vehicle registration to ensure you buy the correct catalytic converter that fits your pony car’s needs and meets your state’s emissions compliance regulations.

Need a 2003 Ford Mustang replacement exhaust system? Shop all BRExhaust 2003 Ford Mustang Direct-Fit Replacement Exhaust Systems to find the best aftermarket kit to replace your 2003 Ford Mustang OEM exhaust.

MagnaFlow offers complete performance exhaust systems for your 2003 Ford Mustang. Determine the power and sound you demand for your 2003 Mustang and shop all available exhaust systems online. Select your '03 Ford Mustang sub-model and engine details to buy the best exhaust system that fits your needs.