Flowmaster Header-Back Exhaust System 409S - Dual Rear Exit-AmeriCan Thunder - Aggressive Sound - 3" Tailpipe RS00500306 Master Rebuild Kit

Master Rebuild Kit

2009-2011 GMC Sierra 3500 HD

1979-1991 GMC C1500

it's made in the USA and backed by Borla's Million-Mile warranty

these are often used with a linear spring to create three spring rates for fine tuning suspension

Flowmaster Header-Back Exhaust System 409S - Dual Rear Exit-AmeriCan Thunder - Aggressive Sound - 3" Tailpipe RS00500306 Master Rebuild KitHeader back System 409S Dual Rear Exit American Thunder(R) Aggressive Sound Fits 1968 to 1972 GM A Body with a V8 engine. For the person who is looking for a complete Header back dual exhaust system with an aggressive tone. This system is mandrel bent for maximum performance and includes specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their