Flowmaster flo717977 - 19-25 GM 1500 Truck 5.3L Flow FX Extreme Cat-Back Exhaust System

Flowmaster introduces our Flow FX Extreme stainless steel cat-back exhaust system for the 2019*-2026 (* 2019 New Body Only) Chevrolet/GMC Silverado/Sierra 1500 with the 5.3L engine. This system uses a Flow FX series muffler for an aggressive to moderate sound level and increased performance. 3.00-inch mandrel bent 409 stainless steel tubing allows for maximum exhaust flow and durability. The system has a turndown style, dump exit right after the muffler to eliminate the over-axle tailpipe. This elimination of the tailpipe helps improve ground clearance and departure angle when you are driving in more extreme off-road situations. This system produced max dyno gains of 15 hp and 20 lb-ft at the rear wheels. All of the necessary hardware is included, and factory-mounting locations are used for an easy installation. Backed by Flowmaster's Lifetime Limited Warranty. Fits 2019*-2026 (*2019 New Body) Chevrolet/GMC Silverado/Sierra 1500 5.3L, Flow FX Extreme 3.00-inch Stainless Steel Cat-Back Exhaust System

• 3.00-inch 16-gauge mandrel bent stainless steel tubing helps maintain maximum exhaust flow for better power
• Flow FX Series performance muffler offers an aggressive to moderate sound level and increased performance
• 409 stainless steel construction delivers extra durability and improved long-term corrosion resistance
• Dump style exit allows for better ground clearance when in extreme off-road conditions
• Includes all necessary hardware for an at home installation
• Max dyno gains of 15 hp and 20 lb-ft at the rear wheels
• Uses factory hanger locations for easy installation
• Lifetime Limited Warranty

The Flowmaster Flow FX Extreme stainless steel cat-back exhaust system is designed for 2019–2026 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks with the 5.3L engine, including 2019 New Body models. It uses a Flow FX Series muffler to provide an aggressive to moderate sound level while supporting increased performance. The system features 3.00-inch, 16-gauge mandrel-bent 409 stainless steel tubing for exhaust flow, durability, and improved long-term corrosion resistance.

A turndown-style dump exit positioned directly after the muffler eliminates the over-axle tailpipe, helping improve ground clearance and departure angle during extreme off-road driving. The system uses factory hanger locations for installation and includes the necessary hardware for an at-home installation. Flowmaster reports maximum dyno gains of 15 horsepower and 20 lb-ft at the rear wheels. The system is backed by Flowmaster's Lifetime Limited Warranty.

Key Features and Performance Benefits

• Mandrel-bent tubing: 3.00-inch 16-gauge stainless steel tubing helps maintain exhaust flow for improved power.
• Flow FX Series muffler: Delivers an aggressive to moderate sound level and increased performance.
• 409 stainless steel construction: Provides durability and improved long-term corrosion resistance.
• Turndown-style exit: Eliminates the over-axle tailpipe to support additional ground clearance for off-road use.

Key Product Specifications and Technical Data

• Brand: Flowmaster
• Part number: flo717977
• Product type: Cat-back exhaust system
• Application: Chevrolet Silverado 1500 and GMC Sierra 1500
• Engine application: 5.3L
• Model years: 2019–2026; 2019 New Body only
• Tubing size: 3.00 inches
• Tubing material: 16-gauge 409 stainless steel

What's Included

The system includes the necessary installation hardware.

Fitment

Fits 2019 Chevrolet Silverado 1500 and 2019 GMC Sierra 1500 applications listed by the manufacturer. The product description specifies compatibility with 2019–2026 Chevrolet Silverado 1500 and GMC Sierra 1500 models with the 5.3L engine, with 2019 New Body models identified.

Fitments:
2019 Chevrolet Silverado 1500 Custom
2019 Chevrolet Silverado 1500 Custom Trail Boss
2019 Chevrolet Silverado 1500 High Country
2019 Chevrolet Silverado 1500 LT
2019 Chevrolet Silverado 1500 LT Trail Boss
2019 Chevrolet Silverado 1500 LTZ
2019 Chevrolet Silverado 1500 RST
2019 Chevrolet Silverado 1500 SSV
2019 Chevrolet Silverado 1500 WT
2019 GMC Sierra 1500 AT4
2019 GMC Sierra 1500 Base
2019 GMC Sierra 1500 Denali
2019 GMC Sierra 1500 Elevation
2019 GMC Sierra 1500 SLE
2019 GMC Sierra 1500 SLT
2020 Chevrolet Silverado 1500 Custom
2020 Chevrolet Silverado 1500 Custom Trail Boss
2020 Chevrolet Silverado 1500 High Country
2020 Chevrolet Silverado 1500 LT
2020 Chevrolet Silverado 1500 LT Trail Boss
2020 Chevrolet Silverado 1500 LTZ
2020 Chevrolet Silverado 1500 RST
2020 Chevrolet Silverado 1500 SSV
2020 Chevrolet Silverado 1500 WT
2020 GMC Sierra 1500 AT4
2020 GMC Sierra 1500 Base
2020 GMC Sierra 1500 Denali
2020 GMC Sierra 1500 Elevation
2020 GMC Sierra 1500 SLE
2020 GMC Sierra 1500 SLT
2021 Chevrolet Silverado 1500 Custom
2021 Chevrolet Silverado 1500 Custom Trail Boss
2021 Chevrolet Silverado 1500 High Country
2021 Chevrolet Silverado 1500 LT
2021 Chevrolet Silverado 1500 LT Trail Boss
2021 Chevrolet Silverado 1500 LTZ
2021 Chevrolet Silverado 1500 RST
2021 Chevrolet Silverado 1500 SSV
2021 Chevrolet Silverado 1500 WT
2021 GMC Sierra 1500 AT4
2021 GMC Sierra 1500 Base
2021 GMC Sierra 1500 Denali
2021 GMC Sierra 1500 Elevation
2021 GMC Sierra 1500 SLE
2021 GMC Sierra 1500 SLT
2022 Chevrolet Silverado 1500 Custom Trail Boss
2022 Chevrolet Silverado 1500 High Country
2022 Chevrolet Silverado 1500 LT
2022 Chevrolet Silverado 1500 LT Trail Boss
2022 Chevrolet Silverado 1500 LTZ
2022 Chevrolet Silverado 1500 RST
2022 Chevrolet Silverado 1500 WT
2022 Chevrolet Silverado 1500 LTD High Country
2022 Chevrolet Silverado 1500 LTD LT
2022 Chevrolet Silverado 1500 LTD LT Trail Boss
2022 Chevrolet Silverado 1500 LTD LTZ
2022 Chevrolet Silverado 1500 LTD RST
2022 Chevrolet Silverado 1500 LTD SSV
2022 Chevrolet Silverado 1500 LTD WT
2022 GMC Sierra 1500 Denali
2022 GMC Sierra 1500 Elevation
2022 GMC Sierra 1500 Pro
2022 GMC Sierra 1500 SLE
2022 GMC Sierra 1500 SLT
2022 GMC Sierra 1500 Limited Denali
2022 GMC Sierra 1500 Limited Elevation
2022 GMC Sierra 1500 Limited Pro
2022 GMC Sierra 1500 Limited SLE
2022 GMC Sierra 1500 Limited SLT
2023 Chevrolet Silverado 1500 Custom Trail Boss
2023 Chevrolet Silverado 1500 High Country
2023 Chevrolet Silverado 1500 LT
2023 Chevrolet Silverado 1500 LT Trail Boss
2023 Chevrolet Silverado 1500 LTZ
2023 Chevrolet Silverado 1500 PPV
2023 Chevrolet Silverado 1500 RST
2023 Chevrolet Silverado 1500 WT
2023 GMC Sierra 1500 Denali
2023 GMC Sierra 1500 Elevation
2023 GMC Sierra 1500 Pro
2023 GMC Sierra 1500 SLE
2023 GMC Sierra 1500 SLT
2024 Chevrolet Silverado 1500 Custom Trail Boss
2024 Chevrolet Silverado 1500 High Country
2024 Chevrolet Silverado 1500 LT
2024 Chevrolet Silverado 1500 LT Trail Boss
2024 Chevrolet Silverado 1500 LTZ
2024 Chevrolet Silverado 1500 PPV
2024 Chevrolet Silverado 1500 RST
2024 Chevrolet Silverado 1500 WT
2024 GMC Sierra 1500 Denali
2024 GMC Sierra 1500 Elevation
2024 GMC Sierra 1500 Pro
2024 GMC Sierra 1500 SLE
2024 GMC Sierra 1500 SLT
2025 Chevrolet Silverado 1500 Custom Trail Boss
2025 Chevrolet Silverado 1500 High Country
2025 Chevrolet Silverado 1500 LT
2025 Chevrolet Silverado 1500 LT Trail Boss
2025 Chevrolet Silverado 1500 LTZ
2025 Chevrolet Silverado 1500 PPV
2025 Chevrolet Silverado 1500 RST
2025 Chevrolet Silverado 1500 WT
2025 GMC Sierra 1500 Denali
2025 GMC Sierra 1500 Elevation
2025 GMC Sierra 1500 Pro
2025 GMC Sierra 1500 SLE
2025 GMC Sierra 1500 SLT
2026 Chevrolet Silverado 1500 Custom Trail Boss
2026 Chevrolet Silverado 1500 High Country
2026 Chevrolet Silverado 1500 LT
2026 Chevrolet Silverado 1500 LT Trail Boss
2026 Chevrolet Silverado 1500 LTZ
2026 Chevrolet Silverado 1500 PPV
2026 Chevrolet Silverado 1500 RST
2026 Chevrolet Silverado 1500 WT
2026 GMC Sierra 1500 Denali
2026 GMC Sierra 1500 Elevation
2026 GMC Sierra 1500 Pro
2026 GMC Sierra 1500 SLE
2026 GMC Sierra 1500 SLT

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Units Per Sku: 1
Regular Stock: t