Flow Fx Cat-Back Exhaust System Fits 2011-2019 Silverado/Sierra 2500/3500 Hd 6.0L V8 Crew Cab/6.5' Bed, Flow Fx 3.5 Inch Cat-Back, Single Side Exit, Stainless Steel Exhaust System - Flowmaster - 717931

The new Flowmaster Flow FX cat-back exhaust system for the 2011-2019 GM Silverado/Sierra 2500/3500 HD trucks with the 6.0-liter engine is manufactured using durable 409 stainless steel throughout and features 3.50-inch mandrel bent pipes for better exhaust gas flow, and a Flow FX straight-through muffler is used for a moderate sound level and maximum performance. Maximum increases on the dyno revealed +21 hp and +23 lb-ft at the rear wheels.

This system exits out the side, behind the rear wheel with a 5.00-inch black ceramic tip for added style and a custom look. The system uses all the existing factory hanger locations and includes installation instructions and all necessary hardware for an easy installation that you can do at home. This exhaust system was designed for Crew Cab Short Bed trucks with the 6.5-foot bed and is backed by Flowmaster's Lifetime Limited Warranty.


Max increases of up to 21 hp and 23 lb-ft over the stock exhaust at the rear wheels

3.50-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability

5.00-inch black ceramic coated tip adds a custom look to the truck

Includes complete hardware and factory styled hangers in the stock locations for an easy installation

Flowfx “straight through” performance muffler delivers a deep, moderate performance tone and improves exhaust flow

Backed by Flowmaster’s lifetime limited warranty