Description
Overview
The Flowmaster Flow FX Cat-back Exhaust System is a complete bolt-on upgrade engineered for the 2019-2026 Chevrolet Silverado 1500 and GMC Sierra 1500 in Crew Cab and Double Cab configurations equipped with the 5.3-liter engine. Built to deliver a bold new attitude and real performance gains, this Flow FX system pairs an aggressive-yet-moderate exhaust note with clean, durable construction that looks as good as it sounds. It fits both 2WD and 4WD models, making it a versatile choice for daily drivers, work trucks, and weekend haulers alike.
Performance and Sound
At the heart of the system is the Flow FX “straight-through” muffler, featuring a single center inlet and dual outlet design that promotes strong flow for maximum performance. A 3.00-inch inlet pipe feeds the 24.00-inch-long muffler, while dual 2.50-inch mandrel-bent tailpipes preserve smooth, unrestricted flow all the way to the exit. Flowmaster reports maximum dyno gains of 18 horsepower and 21 lb-ft of torque at the rear wheels, so you get measurable output alongside that deep, unmistakable Flow FX tone.
Smart Design for Towing
The dual tailpipes exit out the side at an angle behind the rear wheels, directing exhaust away from your boat or travel trailer when towing. This thoughtful routing keeps fumes clear of your gear while giving the truck a purposeful, custom stance. The system is finished with a pair of large 4.50-inch diameter black ceramic-coated 304S stainless steel tips featuring an embossed logo, adding a menacing, factory-plus appearance that matches the aggressive sound.
Built to Last
Manufactured from durable 409 stainless steel throughout, the Flow FX system is built to withstand the elements and years of hard use. It uses all existing factory hanger locations and includes an additional hanger for installing the new left-side tailpipe, so everything lines up cleanly. Installation instructions and all necessary hardware are included for an easy, at-home install.
- Fits 2019-2026 Silverado 1500 / Sierra 1500 Crew Cab and Double Cab with the 5.3L engine (2WD and 4WD)
- Durable 409 stainless steel construction throughout
- 3.00-inch inlet pipe with single-inlet/dual-outlet Flow FX straight-through muffler
- Dual 2.50-inch mandrel-bent side-exit tailpipes angled behind the rear wheels
- 4.50-inch black ceramic-coated 304S stainless steel tips with embossed logo
- Max dyno gains of 18 hp and 21 lb-ft at the rear wheels
- CARB (California) compliant; uses factory hangers plus an included extra hanger
Choose the Flow FX cat-back to transform your Silverado or Sierra with proven flow, an aggressive tone, and a rugged custom look that pays off every time you fire it up.
