🚚Ships from Flowmaster — this item ships direct from the
manufacturer. It usually goes out quickly, but because it leaves their warehouse rather
than ours, delivery can take a little longer than our in-stock parts.
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.
Flow FX “straight through” performance muffler delivers a deep, moderate performance tone and improves exhaust flow
3.50-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
Includes complete hardware and factory styled hangers in the stock locations for an easy installation
Max increases of up to 21 hp and 23 lb-ft over the stock exhaust at the rear wheels
5.00-inch black ceramic coated tip adds a custom look to the truck
Backed by Flowmaster’s lifetime limited warranty
Vehicle Fitment
2011-2019 Chevrolet Silverado 2500 HD
2011-2019 Chevrolet Silverado 3500 HD
2011-2019 GMC Sierra 2500 HD
2011-2019 GMC Sierra 3500 HD
Please verify exact fitment for your trim and engine before ordering.
🚚 Vendor Direct Shipment: This item is not stocked in our warehouse and ships directly from the manufacturer. Please allow additional handling time before dispatch.
Manufacturer Part Number: 717931
Images are for illustrative purposes only. Actual product may vary.
⚠ WARNING (California Proposition 65): This product can expose you to chemicals which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
