Flowmaster American Thunder Cat-Back Exhaust For 04-07 GM 1500 4.3L/4.8L/5.3L tuning The new filter base installs

The new filter base installs in the same location as the stock cartridge filter base and includes quick disconnect fittings for an OE quality fit and finish

5L EcoBoost

The XDP rocker arm bridges are CNC-machined out of hardened 4140 chromoly for extreme strength

ESC Compatibility: FMVSS No

Flowmaster American Thunder Cat-Back Exhaust For 04-07 GM 1500 4.3L/4.8L/5.3L tuning The new filter base installsFor the person who is looking for an aluminized steel cat back exhaust system with an aggressive exterior tone and moderate interior tone. The American Thunder system is heavy 16 gauge mandrel bent aluminized steel tubing for durability and maximum performance. Includes a Super 50 Series performance muffler for that perfect blend of a deep aggressive exterior sound, with a moderate interior tone that won't drive you out of the cab when having a