2019-2025
2014-2018
2007-2013
1999-2006
Installation Time
(approx) 1 Hour
Difficulty Level:
Simple installation for anyone.
Installation Guides
FREE 1 to 3-Day Delivery on Orders $119+ Details
Talk to a Sierra 1500 Sales Tech
1-888-706-1096
M-F 8:30A-11P, Sat-Sun 8:30A-9P
-
Add Details
- Change Vehicle
- Sierra 1500 Builds Gallery
Find Exhaust Systems for your Sierra 1500
Flowmaster Force II Single Exhaust System; Side Exit (14-18 4.3L Sierra 1500)Find parts that fit my vehicle
Item S503515
Sierra 1500 Sales Tech
Verify parts fit & get product recommendations
M-F 8:30A-11P, Sat-Sun 8:30A-9P
$0.00
29 Reviews
Our Price
$1,049.95 each
Ship to: 43215
Please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
Will this fit your Vehicle?
Saved - View your saved items
We're sorry. We couldn't save this product at this time.
or use
Add Local Installation
$299.00
Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Force II Exhaust System Improves Horsepower and Torque
- Stainless Steel Construction
- Bolt-On Installation
- Mild Performance Tone
- Patented Delta Flow Technology
- Lifetime Limited Warranty
- Fits 2014-2018 GMC Sierra 1500 Models w/ 4.3L Engine
| Brand | Flowmaster |
| Exhaust System Type | Cat-Back System |
| Exhaust Tip Finish | Chrome, Polished |
| Exhaust Tubing Diameter | 3.00 Inch |
| Exhaust Material | Stainless Steel |
| Exhaust Tip Outlet Style | Single |
| Exhaust Exit Location | Passenger Side - After Tire |
| Exhaust Loudness | Mild |
Description
Hear the Flow. Flowmaster has long been known for their legendary craftsmanship of the exhaust systems they produce and the Force II Cat-Back Exhaust is no exception. If you’re looking to increase the performance of your GMC Sierra while giving it an aggressive sound, this exhaust system is a great way to go. Aside from the performance aspects, this single side exit exhaust is also emissions legal in most states.
Stainless Steel Construction. The Flowmaster Force II Cat-Back Exhaust System is made of stainless steel and produces a mild tone, thanks to Flowmaster’s patented Delta Flow Techonology. This exhaust is made to last, and bolts on easily, with no welding required.
Easy Installation. The Flowmaster Force II Exhaust can be installed easily in about an hour.
Warranty Information. Flowmaster’s products come with a limited lifetime warranty. Please see full manufacturer's warranty for additonal details and exclusions.
Application. The Flowmaster Force II Cat-Back Exhaust fits 2014-2018 GMC Sierra 1500 models with the 4.3-liter engine.
Shop All Truck Parts And Accessories
Shop All Truck Exhaust
Flowmaster 817672
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) Cat-Back Exhaust
- Installation Hardware
Tech Guides:
4.8
Customer Reviews (29)
Apr 7, 2022
Review shared from Flowmaster Force II Single Exhaust System; Side Exit (07-08 4.8L Sierra 1500)
2008 - Mike03
Installation Time: Less than 1 Hour
2008 gmc sierra
Exhaust is great easy to install only took me around 45 mins. Sounds great..
Fit & Finish 5/5
Loudness (Volume) 4/5
Exhaust Note 0/5
Performance Gain 4/5
Bang For Your Buck 5/5
Mar 2, 2025
Review shared from Flowmaster Force II Single Exhaust System with Polished Tip; Side Exit (15-20 5.3L Yukon)
2018 SLE -
Installation Time: Less than 1 Hour
Flow master
This exhaust is great, sounds fantastic and added a little pick up to.
Fit & Finish 5/5
Loudness (Volume) 4/5
Exhaust Note 0/5
Performance Gain 3/5
Bang For Your Buck 5/5
Jan 6, 2025
Review shared from Flowmaster Force II Single Exhaust System with Polished Tip; Side Exit (15-20 5.3L Tahoe)
2017 LT - TylerJross
Installation Time: Afternoon
Flowmaster force 2 Tahoe
It's a easy install, sounds great not too aggressive no droning sound at cruising speeds, I definitely recommend this exhaust system kit
Fit & Finish 5/5
Loudness (Volume) 3/5
Exhaust Note 5/5
Performance Gain 4/5
Bang For Your Buck 5/5
Jul 3, 2023
Review shared from Flowmaster Force II Single Exhaust System; Side Exit (15-20 5.0L F-150)
2019 XLT - JoeyK86
Installation Time: Less than 1 Hour
Iconic Flowmaster rumble
This was absolutely the sound I was looking for! This was the 3rd Flowmaster set I had on a vehicle and knew the sound and quality wouldn’t disappoint! Install took about 1.5 hours and the only reason why it took that long was because of this one clamp giving me trouble. It is louder than I expected but still isn’t loud enough to be obnoxious! Highly recommend this set!
Fit & Finish 5/5
Loudness (Volume) 3/5
Exhaust Note 5/5
Performance Gain 4/5
Bang For Your Buck 5/5
Apr 26, 2023
Review shared from Flowmaster Force II Single Exhaust System; Side Exit (14-18 5.3L Silverado 1500)
2018 LT - Ackman70
Flowmaster
Very nice catback for someone not looking to wake the neighbors. Nice sound on takeoff and cruising. The system has no drone and looks great. Installation was a breeze.
Fit & Finish 5/5
Loudness (Volume) 2/5
Exhaust Note 5/5
Performance Gain 3/5
Bang For Your Buck 4/5
Apr 19, 2023
Review shared from Flowmaster Force II Single Exhaust System; Side Exit (15-20 5.0L F-150)
2015 XLT - CBR
Installation Time: Afternoon
Good system
I installed this system, replacing the stock system that had a muffler replacement kit installed. The installation was straight forward, with only two minor issues related to the hangers. The replacement hanger ahead of the muffler was out-of-round from the welding, making it a two-person item to install. The second issue was the rod on the rear hanger had to be trimmed slightly to fit over the factory hanger. Regarding sound level, it is louder and deeper than stock. About the same loudness as the modified system I had installed with a slightly deeper tone. When accelerating, it does not get much louder than at idle. Overall it is what I was wanting, and definitely should not annoy the neighbors. The tip tucks under the truck nicely with only about 2" extending beyond the fender looking much better than stock. With a helper, it took about 2 hours to install, a large part of that time being the out-of-round clamp.
Fit & Finish 4/5
Loudness (Volume) 2/5
Exhaust Note 5/5
Performance Gain 0/5
Bang For Your Buck 5/5
Mar 26, 2023
Review shared from Flowmaster Force II Single Exhaust System; Side Exit (15-20 5.0L F-150)
2020 - Rparmer
Installation Time: Less than 1 Hour
Great exhaust
Love the sound and the look easy install great product
Performance Gain 5/5
Bang For Your Buck 5/5
Fit & Finish 5/5
Loudness (Volume) 4/5
Exhaust Note 5/5
Aug 19, 2022
Review shared from Flowmaster Force II Single Exhaust System; Side Exit (15-20 5.0L F-150)
2016 XLT - Caa
Installation Time: Less than 1 Hour
Sounds great but not to loud
This was a really easy install. I have a friend with a lift so it was super easy. Sounds great and just what I was looking for. Good rumble but not so loud I wake the people next door.
Fit & Finish 0/5
Loudness (Volume) 0/5
Exhaust Note 0/5
Performance Gain 0/5
Bang For Your Buck 0/5
Jun 20, 2022
Review shared from Flowmaster Force II Single Exhaust System with Polished Tip; Side Exit (11-19 6.0L Silverado 2500 HD)
2015 LT - Amazingawesome
Installation Time: Less than 1 Hour
Amazing
This exhaust system is the best the sound aggressive and tone it amazing doesn’t get drone at highway speeds
Performance Gain 4/5
Bang For Your Buck 5/5
Fit & Finish 5/5
Loudness (Volume) 4/5
Exhaust Note 4/5
Apr 27, 2022
Review shared from Flowmaster Force II Single Exhaust System; Side Exit (15-20 5.0L F-150)
5ohaveragejoe
Installation Time: Less than 1 Hour
Force II
Was exactly what I was looking for. Not very loud, but you know it's there. It sounds like a Truck now and I love it.
Fit & Finish 5/5
Loudness (Volume) 2/5
Exhaust Note 4/5
Performance Gain 1/5
Bang For Your Buck 5/5
Questions & Answers
No questions about this product yet.
Ask the First Question
Will It Fit My Sierra 1500
- 4.3L V6 - 14, 15, 16, 17, 18
Designed for Double & Crew Cab Models. It is not compatible on 2WD Crew Cab Models with 2-Piece Driveshaft.
