The Flowmaster Flow FX Cat-back Exhaust System is designed to enhance sound, appearance, and performance for the 2019–2026 GM Silverado and Sierra 1500 equipped with the 5.3L engine. Built for both 2WD and 4WD models with 148-inch or 157-inch wheelbases, this system delivers a powerful exhaust note while improving rear-wheel performance.

Constructed from 409S stainless steel, the system features a 3.00-inch inlet pipe that feeds into a Flow FX straight-through muffler to maximize horsepower and torque. Dyno testing shows gains of up to +10 hp and +12 lb-ft of torque at the rear wheels.

Fitment 

• Fits 2019–2026 Chevrolet Silverado 1500

• Fits 2019–2026 GMC Sierra 1500

• Fits 5.3L engine

• Fits 2-Wheel Drive models

• Fits 4-Wheel Drive models

• Fits 148-inch wheelbase

• Fits 157-inch wheelbase

Features

• Deep, powerful tone inside and outside the vehicle

• Large 4.5-inch stainless steel black ceramic coated exhaust tip

• Max dyno gains of +10 hp and +12 lb-ft torque

• Flow FX straight-through performance muffler

• Uses factory hanger locations

• Full stainless steel construction

• Lifetime Limited Warranty

• Easy at-home installation

The 3.00-inch mandrel-bent tailpipe exits behind the passenger-side rear tire and is finished with a bold 4.50-inch black ceramic coated 304 stainless steel tip, giving your truck a custom, performance-driven look. This system installs easily using factory hanger locations, requires no cutting or welding, and includes all necessary hardware and detailed instructions. A Lifetime Limited Warranty ensures long-term confidence and durability.