Flowmaster American Thunder Exhaust System Cat Back 2-1/2" Tailpipe Steel - Aluminized RS00400306 The inner fleece lining is

The inner fleece lining is fire retardant

Rollin' Thunder camshafts feature more aggressive lift profiles than possible with conventional flat-tappet hydraulic cams

is perfect for the person looking for an aggressive exterior and interior sound with all of the performance benefits that you would expect from Flowmaster

This saves weight

Flowmaster American Thunder Exhaust System Cat Back 2-1/2" Tailpipe Steel - Aluminized RS00400306 The inner fleece lining isFor the person who is looking for a complete Cat back dual exhaust system with a moderate sound level. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. This America Thunder system delivers a moderate interior and exterior tone and is suited to the enthusiast who wants to hear the rumble of their truck. Like all Flowmaster systems, the benefits include improved throttle response,