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 Force II Dual Exhaust System; Side/Rear Exit (14-18 4.3L Sierra 1500)Find parts that fit my vehicle
Item S503513
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$950.36
11 Reviews
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-10% $950.36 kit Was $1,055.95
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$299.00
Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Split Side and Rear Exit Cat-Back Exhaust System
- Produces Moderate Exhaust Sound Level
- Superior Interior and Exterior Sound Maintenance
- Signature Delta Flow Technology
- Dyno Tuned for Superior Performance
- Features 50 Series Muffler
- 2.5-inch Mandrel Bent Tailpipes
- 304 Stainless Steel Polished Tips
- Simple and Swift Bolt-On Installation
- Welding Required
- Lifetime Limited Warranty
- Fits All 2014-2018 4.3L GMC Sierra 1500 Double and Crew Cab Models
- Not Compatible with 2WD Crew Cab w/ 2-Piece Driveshaft
| 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 | Mild |
Description
A Sound Preference. The Flowmaster Force II Cat-Back Exhaust - Split Side/Rear Exit is for drivers who can appreciate the sound of easy moderation. This ultra-designed split side rear exit cat-back exhaust system produces a moderate exhaust sound level with a superior interior and exterior sound maintenance.
A Sound Performance. This cat-back system is backed by Force II signature delta flow technology. Drivers will have the added benefits of increased power, torque, mileage, and engine response all centered around a power and welcoming and powerful exhaust tone. This system has been Dyno tuned for superior performance.
Fine Tuned. This Exhaust kit features a Super 50 Series Muffler, dual 2.5-inch mandrel bent 16-gauge stainless steel tailpipes, and 304 stainless-steel polished tips. All fine-tuned and assembled for a rugged and elegant exhaust design.
Installation. The Flowmaster Force II follows a simple and swift bolt-on installation with little to non-modifications. Flowmaster recommends welding for stronger and lasting connection. Mounting hangers, hardware, and instructions are included.
Lifetime Limited Warranty. Flowmaster offers a lifetime limited warranty on all stainless steel constructed products.
Application. The Flowmaster Force II Cat-Back Exhaust - Split Side/Rear Exit is designed for use on all 2014-2018 4.3L GMC Sierra 1500 models. Note: Designed for double & crew cab models. It is not compatible on 2WD crew cab models with 2-piece driveshaft.
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Fitment:
- 2014 GMC Sierra 1500
- 2015 GMC Sierra 1500
- 2016 GMC Sierra 1500
- 2017 GMC Sierra 1500
- 2018 GMC Sierra 1500
Flowmaster 817666
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’ Bed Extension
- (1) Muffler
- (1) Tailpipe, Right
- (1) Tailpipe, Left Front
- (1) Tailpipe, Left Rear
- (2) Side Exit Pipes R/L
- (2) Rear Exit Pipes R/L
- (2) Stainless Tips
- (3) Hangers;
- (6) Brackets;
- Installation Hardware
Tech Guides:
4.8
Customer Reviews (11)
Questions & Answers
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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.
