2019-2025
2014-2018
2007-2013
1999-2006
Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Guaranteed 12/24 Delivery Still Available see item page for details! available on most items - Details
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Flowmaster American Thunder Dual Exhaust System with Quad Black Tips; Rear Exit (19-21 5.3L Sierra w/ Factory Dual Exhaust)Find parts that fit my vehicle
Item S510686
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$899.96
246 Reviews
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-10% $899.96 kit Was $999.95
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$299.00
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Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Yields a Loud and Aggressive Sound
- Increases Horsepower and Torque
- Chambered Muffler Style
- With a 3-Inch Main Tubing
- Stainless Steel Exhaust Tubing
- With 4-Inch Quad Black Tips
- Rear Exit Location
- Direct Installation
- Not CARB-Certified
- Engineered to Fit 2019-2021 5.3L GMC Sierra 1500 Models With Factory Dual Exhausts
| Brand | Flowmaster |
| Exhaust System Type | Cat-Back System |
| Exhaust Tip Finish | Black, Black Chrome |
| Exhaust Tubing Diameter | 3.00 Inch |
| Exhaust Material | Stainless Steel |
| Exhaust Tip Outlet Style | Quad |
| Exhaust Exit Location | Rear - Dual |
| Exhaust Loudness | Moderate |
Description
Yields a Loud and Aggressive Sound. Replace your old factory exhaust system with this Flowmaster American Thunder Dual Exhaust System with Quad Black Tips. This exhaust system allows your truck to yield a loud and aggressive sound, signifying peak performance. Thanks to its chambered muffler design, your truck will be able to drive through the rugged trail with an attention-grabbing roar.
Significant Power Gains. Installing this exhaust system will let your truck experience significant power gains. With its unique shape and diameter, this exhaust system optimizes your truck’s exhaust flow, resulting in horsepower and torque boosts.
Made of Stainless Steel. This exhaust system is made of stainless steel to handle your truck’s heavy-duty performance. With its stainless steel construction, this exhaust system will not easily rust, fail, or break. Provided with regular care, this exhaust system can serve you for several years.
Direct Installation. Setting up this exhaust system is fairly easy especially to those equipped with mechanical skills. With its direct bolt-on design, you can easily mount this to your truck’s factory location points without performing major modifications.
Application. This Flowmaster American Thunder Dual Exhaust System with Quad Black Tips is engineered to fit 2019-2021 5.3L GMC Sierra 1500 models with factory dual exhausts.
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Fitment:
- 2019 GMC Sierra 1500
- 2020 GMC Sierra 1500
- 2021 GMC Sierra 1500
- 2022 GMC Sierra 1500
- 2023 GMC Sierra 1500
- 2024 GMC Sierra 1500
- 2025 GMC Sierra 1500
Flowmaster 817895
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Muffler
- (4) Tips
- (1) Inlet Pipe
- (1) Extension Pipe
- (1) Right Front Tailpipe
- (1) Left Front Tailpipe
- (1) Right Rear Tailpipe
- (1) Left Rear Tailpipe
- (6) Band Clamps
- (5) Hanger Keepers
4.6
Customer Reviews (246)
Questions & Answers
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Will It Fit My Sierra 1500
- 3.0L I6 Duramax - 22
- 5.3L V8 - 19, 20, 21, 22, 23, 24, 25
- 6.2L V8 - 22
Designed for Double Cab and Crew Cab Models
