Flowmaster American Thunder Cat-Back Exhaust For 1999-2004 Ford Lightning 5.4L 2011-2015 6.6l lml duramax - Proudly made in the

- Proudly made in the USA

8L was engineered to minimize air restriction and flows 70

Polished finish

Internal fins transfer heat through the cover into the external fins

Dyno Proven:

Flowmaster American Thunder Cat-Back Exhaust For 1999-2004 Ford Lightning 5.4L 2011-2015 6.6l lml duramax - Proudly made in theFor the person who wants the aggressive look of a NASCAR race truck along with all the benefits that a Flowmaster Cat back exhaust system provides. D. O. S. S. (Dual out same side) systems are the perfect choice. This American Thunder system features a Super 50 Series performance muffler that delivers a moderately aggressive exterior sound with a moderate interior tone, which is suited to the enthusiast who wants their performance to be heard. The