Exhaust› Exhaust Pipes, Systems and Components
Flowmaster
Flow Fx Cat-Back Exhaust System Fits 2011-2019 Silverado/Sierra 2500/3500 Hd 6.0L V8 Crew Cab/6.5' Bed, Flow Fx 3.5 Inch Cat-Back, Single Side Exit, Stainless Steel Exhaust System Flowmaster
SKU: F00L 717931
Easy — 1–2 hours
Description
Part #: 717931
The new Flowmaster Flow FX cat-back exhaust system for the 2011-2019 GM Silverado/Sierra 2500/3500 HD trucks with the 6.0-liter engine is manufactured using durable 409 stainless steel throughout and features 3.50-inch mandrel bent pipes for better exhaust gas flow, and a Flow FX straight-through muffler is used for a moderate sound level and maximum performance. Maximum increases on the dyno revealed +21 hp and +23 lb-ft at the rear wheels.This system exits out the side, behind the rear wheel with a 5.00-inch black ceramic tip for added style and a custom look. The system uses all the existing factory hanger locations and includes installation instructions and all necessary hardware for an easy installation that you can do at home. This exhaust system was designed for Crew Cab Short Bed trucks with the 6.5-foot bed and is backed by Flowmaster's Lifetime Limited Warranty.Max increases of up to 21 hp and 23 lb-ft over the stock exhaust at the rear wheels3.50-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability5.00-inch black ceramic coated tip adds a custom look to the truckIncludes complete hardware and factory styled hangers in the stock locations for an easy installationFlowfx straight through performance muffler delivers a deep, moderate performance tone and improves exhaust flowBacked by Flowmaster (TM)s lifetime limited warranty
Features:
- Max increases of up to 21 hp and 23 lb-ft over the stock exhaust at the rear wheels
- 3.50-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
- 5.00-inch black ceramic coated tip adds a custom look to the truck
- Includes complete hardware and factory styled hangers in the stock locations for an easy installation
- Flowfx straight through" performance muffler delivers a deep, moderate performance tone and improves exhaust flow
- Backed by Flowmaster's lifetime limited warranty
Fits 2011-2019 GM Silverado/Sierra 2500/3500 HD 6.0L V8 Crew Cab/6.5' Bed, FlowFX 3.5" Cat-Back, Single Side Exit, Stainless Steel Exhaust System
MIA's Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Flowmaster |
| Part Number | F00L 717931 |
Videos
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
View Full Return Policy