Description
Overview
The Flowmaster® Flow FX® Chevrolet, GMC (6.0) Exhaust System Kit is a complete cat-back exhaust system engineered for the 2011-2019 GM 2500HD/3500HD trucks powered by the 6.0-liter engine. Built to deliver improved flow, aggressive tone, and a factory-easy install, this Flow FX cat-back is a straightforward upgrade for owners who want a genuine performance exhaust without cutting corners. If you have been ready to shop for exhaust that adds power, sound, and style to your heavy-duty GM truck, this Flowmaster kit checks every box.
Performance & Sound
Constructed from durable 409 stainless steel throughout, the system uses 3.50 to 3.00-inch mandrel bent pipes to smooth out the exhaust gas flow and reduce restriction. That flow improvement translates into max gains of 10 horsepower and 10 lb-ft of torque at the rear wheels over stock. On the audio side, the Flow FX muffler produces an Aggressive / Moderate sound level — deep and confident under throttle without droning inside the cab. As a complete catback exhaust system, it replaces the restrictive factory piping from the cat back and lets the 6.0 breathe.
Style & Fitment
The dual tail pipe layout exits with dual 4.00-inch stainless steel tips featuring an embossed tip logo for a clean, custom look at the rear bumper. The Flow FX muffler measures 24.00 inches in overall length with a center inlet, dual outlets, and a 3.00-inch outlet diameter. Installation is designed to be a DIY-friendly job at home: the system uses all the existing factory hanger locations and includes installation instructions plus all necessary hardware. Note that this exhaust system fits extended cab or crew cab models equipped with the 6.5-foot bed only.
Highlights
- Flowmaster Flow FX cat-back exhaust system for 2011-2019 GM 2500HD/3500HD trucks with the 6.0-liter engine
- Durable 409 stainless steel construction throughout for long service life
- 3.50 to 3.00-inch mandrel bent exhaust pipe for improved exhaust gas flow
- Max gains of 10 hp and 10 lb-ft of torque at the rear wheels over stock
- Dual 4.00-inch stainless steel tips with embossed logo for a custom appearance
- Uses factory hanger locations; includes instructions and all necessary hardware
Confidence & Compliance
This Flowmaster exhaust system is CARB (California) compliant with Emission Code 5, making it a smart choice for owners in emissions-regulated states. It is also backed by Flowmaster’s Lifetime Limited Warranty, so you can install and drive with confidence. Whether you are comparing borla exhaust, corsa exhaust, or magnaflow exhaust options and searching for the right exhaust pipe upgrade, this Flow FX kit delivers proven Flowmaster engineering, an aggressive tone, and a bolt-on fit tailored to the 6.0-liter HD platform.
