2004 to 2005 Dodge Ram 1500 with a 5.7L Hemi V8 engine, fits all wheelbases. American Thunder Kit Cat back, exhaust, performance exhaust, exhaust kit Cat-back 409S 04-05 Ram 1500 Cat-back System 409S - Single Side Exit - American Thunder - Moderate Sound Exhaust System Kit Fits 2004 to 2005 Dodge Ram 1500 with a 5.7L Hemi V8 engine, fits all wheelbases. For the person who wants a subtle custom appearance with all the benefits that a Flowmaster Cat-back exhaust system provides. SOS. (Single out side) systems are the perfect choice. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.
