Description
Overview
The Flowmaster Force II Cat-back Exhaust System is engineered to unlock better flow and a stronger exhaust note on 2011-2019 GM Silverado and Sierra 2500HD/3500HD crew cab trucks equipped with the 6.0L engine. Built around 3.50-inch mandrel-bent stainless steel tubing, this complete Force II series system replaces the restrictive factory piping with a smooth, high-flow path from the cat-back rearward. It’s a purpose-built upgrade for heavy-duty GM owners who want improved performance and a refined, aggressive tone without a harsh, droning cabin experience.
At the heart of the system is Flowmaster’s 50 Series Big Block performance muffler, tuned to deliver a mild to moderate tone inside the cab and a moderate sound level outside the truck. That balance makes it an ideal match for daily driving, long highway hauls, and work duty, giving you presence when you get on the throttle while staying comfortable at cruise.
Key Benefits
This is a true cat-back kit that includes the muffler, tubing, tailpipe, and all necessary hardware. The tailpipe exits behind the right rear tire, a configuration specifically chosen for towing applications, and is capped with a large 4.00-inch polished stainless steel tip for a clean, finished look at the bumper. Because the system is designed to use the factory hanger locations, installation is quick and straightforward, making it a realistic at-home upgrade with the included detailed instructions.
- 3.50-inch mandrel-bent stainless steel tubing for smooth, consistent flow
- 50 Series Big Block performance muffler included for a mild-to-moderate tone
- Large 4.00-inch polished stainless steel exhaust tip
- Tailpipe exits behind the right rear tire, ideal for towing
- Bolts to factory hanger locations for a fast, easy install
- Includes all necessary parts, hardware, and detailed instructions
- Emissions legal and CARB (California) compliant
Sound & Materials
Stainless steel construction throughout means durability and corrosion resistance built to stand up to the demands of a heavy-duty work truck. The silver-finished piping and polished stainless tip look the part, while the 50 Series Big Block muffler tuning keeps the interior tone comfortable and the exterior note assertive but never obnoxious.
Fitment
This system is specifically designed for 2011-2019 GM Silverado/Sierra 2500HD/3500HD crew cab/short bed trucks with the 6.0L engine, and it fits both 2 and 4 wheel drive crew cab models with the 6.5ft bed. It carries an Emission Code of 5 and is CARB compliant, so it’s emissions legal for use. Please note a California Proposition 65 warning applies. The system is covered by Flowmaster’s Limited Lifetime Warranty.
