2019-2025
2014-2018
2007-2013
1999-2006
Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
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Flowmaster American Thunder Dual Exhaust System; Side/Rear Exit (14-18 4.3L Silverado 1500)Find parts that fit my vehicle
Item S104240
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$899.96
245 Reviews
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-10% $899.96 kit Was $999.95
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$299.00
Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Moderate to Aggressive Sound Level
- Improved Scavenging and Exhaust Flow for Increased Horsepower and Torque
- Delta Flow™ Super 40 Series Muffler
- Features 2.5 in. Mandrel Bent Stainless Steel Tubing
- Comes with 3.0 in. Polished Stainless Steel Exhaust Tips
- Split Side or Dual Rear Exits
- Bolt-On Installation
- Designed for Double and Crew Cab Models
- Not Compatible with 2WD Crew Cab Models with 2-Piece Driveshaft
- Fits 2014 to 2018 4.3L Chevy Silverado 1500 Models
| 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 or Rear - After Tire |
| Exhaust Loudness | Moderate |
Description
Distinctive Flowmaster Sound. The Flowmaster American Thunder Cat-Back Exhaust is designed to deliver a distinctive powerful exterior sound level while keeping the interior sound level moderate. Utilizing their patented Delta Flow technology, Flowmaster is able to calibrate the interior and exterior sound levels. This means that you can still turn heads with your Silverado’s attention-grabbing growls and still enjoy a comfortable ride with reduced sound levels inside the cab.
Improved Performance. Another benefit of Flowmaster’s Delta Flow technology is the improved scavenging design. By combining this with the mandrel-bent tubing’s smoother exhaust flow, the kit is able to significantly improve the Silverado’s performance.
High-Quality Stainless Steel Construction. The American Thunder is made from high-grade stainless steel to give it outstanding durability and longevity. Precision-machined mandrel-bent tubing provides the smoothest airflow possible while delivering the desired sound levels.
Designed for Easy Fit. The American Thunder Cat-Back Exhaust is designed to make the installation process as simple as possible. It comes with the optional parts for either dual side or dual rear exit configuration. Flowmaster recommends welding all slip-fit connections for a more secure installation.
Application. The Flowmaster American Thunder Cat-Back Exhaust with split side or rear exits is designed to fit 2014 to 2018 4.3L Chevy Silverado 1500 models equipped with Double or Crew Cabs. It’s not compatible with 2WD Crew Cab models with 2-piece driveshaft.
Improved Performance. Another benefit of Flowmaster’s Delta Flow technology is the improved scavenging design. By combining this with the mandrel-bent tubing’s smoother exhaust flow, the kit is able to significantly improve the Silverado’s performance.
High-Quality Stainless Steel Construction. The American Thunder is made from high-grade stainless steel to give it outstanding durability and longevity. Precision-machined mandrel-bent tubing provides the smoothest airflow possible while delivering the desired sound levels.
Designed for Easy Fit. The American Thunder Cat-Back Exhaust is designed to make the installation process as simple as possible. It comes with the optional parts for either dual side or dual rear exit configuration. Flowmaster recommends welding all slip-fit connections for a more secure installation.
Application. The Flowmaster American Thunder Cat-Back Exhaust with split side or rear exits is designed to fit 2014 to 2018 4.3L Chevy Silverado 1500 models equipped with Double or Crew Cabs. It’s not compatible with 2WD Crew Cab models with 2-piece driveshaft.
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Fitment:
- 2014 Chevrolet Silverado 1500
- 2015 Chevrolet Silverado 1500
- 2016 Chevrolet Silverado 1500
- 2017 Chevrolet Silverado 1500
- 2018 Chevrolet Silverado 1500
Flowmaster 817669
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) Inlet Pipe
- (1) 6.5 ft. Bed Extension
- (1) Muffler
- (1) Tailpipe, Right
- (1) Tailpipe, Left Front
- (1) Tailpipe, Left Rear
- (2) Side Exit Pipes (Right and Left)
- (2) Rear Exit Pipes (Right and Left)
- (2) Stainless Tips
- Installation Hardware
4.6
Customer Reviews (245)
Questions & Answers
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Will It Fit My Silverado 1500
- 5.3L V8 - 14, 15, 16, 17, 18
Designed for Double & Crew Cab Models. It is not compatible on 2WD Crew Cab Models with 2-Piece Driveshaft.
