Description
Overview
The Flowmaster Flow FX Cat-Back Exhaust System is engineered to give your GM 1500 truck a stronger exhale, a deeper attitude, and a genuine bump in rear-wheel power. Designed specifically for 2011-2018 GM 1500 trucks equipped with the 6.2-liter V8 engine, this complete cat-back kit replaces the restrictive factory piping with a free-flowing, performance-tuned system that installs using all the existing factory hanger locations. It’s a straightforward upgrade that transforms both how your truck performs and how it sounds.
At the heart of the system is the Flow FX “straight-through” muffler, built to deliver a moderate sound level that stays refined at cruise while opening up under throttle. Because it’s a straight-through design, it prioritizes maximum flow and performance without the drone that plagues cheaper systems. On the dyno, this setup produced maximum gains of +11 horsepower and +15 lb-ft of torque at the rear wheels.
Built to Last
Every component is manufactured from durable 409 stainless steel throughout, so the system stands up to heat, road spray, and the elements over the long haul. The piping steps from a single 3.50-inch section into dual 2.50-inch mandrel-bent pipes, keeping the exhaust gas path smooth and consistent for better flow. The 24-inch Flow FX muffler features a center inlet and dual outlets to feed the dual tailpipe configuration cleanly.
Style That Shows
The system exits out both sides, behind the rear wheels, and is finished with 4.50-inch black ceramic tips carrying an embossed logo for added style and a custom look. It’s the kind of finishing touch that makes your truck stand out at the tailgate as much as it does on the open road.
- Direct fit for 2011-2018 GM 1500 trucks with the 6.2-liter V8
- 409 stainless steel construction throughout for lasting durability
- Single 3.50-inch to dual 2.50-inch mandrel-bent pipes for improved flow
- Flow FX straight-through muffler with a moderate sound level
- Dyno-verified gains up to +11 hp and +15 lb-ft at the rear wheels
- 4.50-inch black ceramic tips with embossed logo, exiting behind the rear wheels on both sides
- CARB (California) compliant
Easy At-Home Installation
Because the Flow FX cat-back uses all the existing factory hanger locations, there’s no cutting or custom fabrication required. The kit includes detailed installation instructions and all necessary hardware, making it a weekend project you can tackle in your own garage. The whole system is backed by Flowmaster’s Lifetime Limited Warranty for lasting peace of mind.
Warning: This product can expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information, see California Proposition 65.
