2019-2025
2014-2018
2007-2013
1999-2006
Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
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Flowmaster American Thunder Dual Exhaust System with Polished Tips; Side/Rear Exit (19-25 5.3L Sierra 1500 w/o Factory Dual Exhaust)Find parts that fit my vehicle
Item S510685
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$993.56
245 Reviews
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-10% $993.56 kit Was $1,103.95
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$299.00
Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Delivers a Loud and Aggressive Sound
- Adds More Horsepower and Torque
- Reflection Muffler Type
- With a 2.50-Inch Main Tubing
- Features Stainless Steel Exhaust Tubing
- Has 3.50-Inch Polished Double Wall Tips
- Side/Rear Exit Location
- Direct Installation
- Not CARB-Certified
- Fits 2019-2025 5.3L Sierra 1500s without Factory Dual Exhaust
| Brand | Flowmaster |
| Exhaust System Type | Cat-Back System |
| Exhaust Tip Finish | Chrome, Polished |
| Exhaust Tubing Diameter | 2.50 Inch |
| Exhaust Material | Stainless Steel |
| Exhaust Tip Outlet Style | Dual |
| Exhaust Exit Location | Both Sides - After Tire |
| Exhaust Loudness | Moderate |
Description
Loud and Aggressive Sound. If you want to catch the attention of everyone as you drive, then equip your truck with this Flowmaster American Thunder Dual Exhaust System with Polished Tips. This exhaust system comes with a reflection muffler type that allows your truck to create a loud and aggressive sound.
Offers Power Boosts. Simply installing this exhaust system will let your truck achieve significant power boosts. By improving your truck’s exhaust flow, this exhaust system can increase your horsepower and torque.
Stainless Steel Construction. Built to handle your truck’s harsh driving conditions, this exhaust system is made using durable stainless steel. With this material, the exhaust system is able to resist rust and corrosion, allowing it to perform for several years.
Direct Installation. This exhaust system installs by directly mounting its components to your truck’s factory location points. To facilitate an easier installation, raise your truck to a working height. No major modifications are required.
Application. This Flowmaster American Thunder Dual Exhaust System with Polished Tips is made to fit 2019-2025 5.3L Sierra 1500s without Factory Dual Exhaust.
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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 817853
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) AMT Muffler
- (2) Tips
- (1) Inlet Pipe
- (1) Extension Pipe
- (1) Left Front Tailpipe
- (1) Left Rear Tailpipe
- (1) Right Tailpipe
- (2) Side Exit Pipes
- (2) Rear Exit Pipes
- (1) Left Rear Frame Hanger
- (2) Backing Plates
- (1) Rubber Hanger
- (7) Band Clamps
- (1) Hex Cap Screw
- (1) Flat Washer
- (1) Lock Washer
- (1) Nut
- (6) Hanger Keepers
- (1) Zip Tie
4.6
Customer Reviews (245)
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
