Upgrade the sound, performance, and factory-style appearance of your 2019–2026 Chevrolet Silverado 1500 or GMC Sierra 1500 (new body style) with the Flowmaster Flow FX Cat-Back Exhaust System. Designed for trucks equipped with the 5.3-liter engine and factory dual tailpipes, this system delivers an aggressive to moderate exhaust tone with impressive performance gains.

A 3.00-inch inlet pipe feeds into a single-inlet, dual-outlet Flow FX straight-through muffler, engineered for maximum flow and a deep, powerful tone inside and outside the vehicle. Dyno testing reveals gains of up to 21 horsepower and 26 lb-ft of torque at the rear wheels.

Constructed from durable 409 stainless steel, the system features dual 2.50-inch mandrel-bent tailpipes routed to clear the spare tire and tow hitch. The exhaust exits cleanly through the factory dual exhaust bumper bezels, maintaining the OE-style appearance.

Installation is simple thanks to the use of factory hanger locations. All required hardware and instructions are included, making this a convenient bolt-on upgrade suitable for at-home installation. Fits both 2WD and 4WD models and includes Flowmaster’s Lifetime Limited Warranty.

Highlights
• Deep, powerful tone inside and outside the truck
• Up to 21 hp and 26 lb-ft gains at the wheels
• Flow FX straight-through performance muffler
• Exits through factory rear bumper dual exhaust bezels
• All mandrel-bent stainless steel tubing
• Uses factory hanger locations
• Includes all necessary hardware
• Easy at-home installation
• Lifetime Limited Warranty

Fitment 

Fits the following vehicles (new body style):

• 2019 Chevrolet Silverado 1500 5.3L with factory dual tailpipes
• 2020 Chevrolet Silverado 1500 5.3L with factory dual tailpipes
• 2021 Chevrolet Silverado 1500 5.3L with factory dual tailpipes
• 2022 Chevrolet Silverado 1500 5.3L with factory dual tailpipes
• 2023 Chevrolet Silverado 1500 5.3L with factory dual tailpipes
• 2024 Chevrolet Silverado 1500 5.3L with factory dual tailpipes
• 2025 Chevrolet Silverado 1500 5.3L with factory dual tailpipes
• 2026 Chevrolet Silverado 1500 5.3L with factory dual tailpipes

• 2019 GMC Sierra 1500 5.3L with factory dual tailpipes
• 2020 GMC Sierra 1500 5.3L with factory dual tailpipes
• 2021 GMC Sierra 1500 5.3L with factory dual tailpipes
• 2022 GMC Sierra 1500 5.3L with factory dual tailpipes
• 2023 GMC Sierra 1500 5.3L with factory dual tailpipes
• 2024 GMC Sierra 1500 5.3L with factory dual tailpipes
• 2025 GMC Sierra 1500 5.3L with factory dual tailpipes
• 2026 GMC Sierra 1500 5.3L with factory dual tailpipes

Fits 2WD and 4WD.