Flowmaster Flow FX Cat-Back Exhaust System - Flowmaster (717927)
Sale Price$828.78
Description : Flowmaster's® Flow FX Cat-Back exhaust system for the 2020-2026 GM 2500HD and 3500HD trucks with the 6.6L gas engines gives you a great way to help you customize your GM truck to your personality. This performance exhaust system fits both 2/4 Wheel drive models and is manufactured from 409 stainless steel for years of trouble-free service and performance. Features include a 3.50-inch inlet pipe leading into a 409 stainless steel Flow FX series "straight-through" muffler for great sound and maximum performance and no drone. The muffler then connects to the factory tailpipe for a simple and effective performance upgrade. Max dyno gains of 11 hp and 10 lb-ft at the rear wheels. This results in better acceleration and towing performance. The system uses all the factory hanger locations and connections for an easy installation that you can do at home. Kits include installation instructions and all necessary hardware. Backed by Flowmaster's Lifetime Limited Warranty.
Fits 20-26 GM 2500HD/3500HD 6.6L Gas Engine FFX Cat-Back Single Exit Exhaust System, 409 stainless steel
20-25 GM 2500/3500HD, 6.6L, CB, FFX, SOS
SYS 20-26 GM
Manufacturer of performance exhaust systems, mufflers, performance air intakes, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 4 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.
Fits 20-26 GM 2500HD/3500HD 6.6L Gas Engine FFX Cat-Back Single Exit Exhaust System, 409 stainless steel
20-25 GM 2500/3500HD, 6.6L, CB, FFX, SOS
SYS 20-26 GM
Manufacturer of performance exhaust systems, mufflers, performance air intakes, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 4 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.
- Return Policy
- Min. 12 Months
- Safe, Secure Checkout
Product Details
Installation GuideDescription
Flowmaster's® Flow FX Cat-Back exhaust system for the 2020-2026 GM 2500HD and 3500HD trucks with the 6.6L gas engines gives you a great way to help you customize your GM truck to your personality. This performance exhaust system fits both 2/4 Wheel drive models and is manufactured from 409 stainless steel for years of trouble-free service and performance. Features include a 3.50-inch inlet pipe leading into a 409 stainless steel Flow FX series "straight-through" muffler for great sound and maximum performance and no drone. The muffler then connects to the factory tailpipe for a simple and effective performance upgrade. Max dyno gains of 11 hp and 10 lb-ft at the rear wheels. This results in better acceleration and towing performance. The system uses all the factory hanger locations and connections for an easy installation that you can do at home. Kits include installation instructions and all necessary hardware. Backed by Flowmaster's Lifetime Limited Warranty.
Fits 20-26 GM 2500HD/3500HD 6.6L Gas Engine FFX Cat-Back Single Exit Exhaust System, 409 stainless steel
20-25 GM 2500/3500HD, 6.6L, CB, FFX, SOS
SYS 20-26 GM
Manufacturer of performance exhaust systems, mufflers, performance air intakes, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 4 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.
Fits 20-26 GM 2500HD/3500HD 6.6L Gas Engine FFX Cat-Back Single Exit Exhaust System, 409 stainless steel
20-25 GM 2500/3500HD, 6.6L, CB, FFX, SOS
SYS 20-26 GM
Manufacturer of performance exhaust systems, mufflers, performance air intakes, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 4 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.
Features & Benefits
- 3.5-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
- Kit includes complete hardware and factory styled hangers in the stock locations for an easy installation
- A tuned Flow FX style muffler delivers a deep, aggressive to moderate performance tone and improves exhaust flow with no drone
- Max increases of up to 11 hp and 10 lb-ft over the stock exhaust at the wheels
- Tuned performance muffler eliminates interior drone
- Maintains factory warranty
- Lifetime Limited Warranty
Part Number (MPN)
717927
Brand
SKU
717927
UPC / GTIN
090127976470 / 00090127976470
Condition
New
Disclaimer
Yes
Brand
Flowmaster
California Proposition 65 Chemical Name
Nickel (Metallic)<br />Chromium (hexavalent compounds)
CARB (California) Compliant
Yes
Catalytic Converter Included
No
Catalytic Converter Quantity
0
Category
Exhaust
Choose Your Part
Exhaust System
Clamping Type
Flat Band
Clamps Included
Yes
Drive
4WD<br />2WD
Emission Code
5
Exhaust Series
Flow FX
Exhaust Tip Color
Black
Exhaust Tip Connection
Clamp-On
Exhaust Tip Cut
Angled
Exhaust Tip Diameter
5.00
Exhaust Tip Edge
Rolled Edge Angle Cut
Exhaust Tip Finish
Black Ceramic Coating
Exhaust Tip Intercooled
No
Exhaust Tip Length
12.00
Exhaust Tip Material
304 Stainless Steel
Exhaust Tip Quantity
1
Exhaust Tip Resonated
No
Exhaust Tip Shape
Round
Exhaust Tip Wall
Single Wall
Exit Style
Single Out Side
Finish
Natural
Gasket Or Seal Included
No
Grade Type
Performance
Hangers Included
Yes
Heat Shield Included
No
Inlet Diameter
3.50
Inlet Type
Flanged
Main Piping Diameter
3.50
Mount Type
Uses Factory Hanger
Mounting Bracket Included
No
Muffler Body Height
5.00
Muffler Body Length
18.00
Muffler Body Material
409 Stainless Steel
Muffler Body Shape
Oval
Muffler Body Width
8.00
Muffler Color
Natural
Muffler Finish
Natural
Muffler Flanged Inlet
No
Muffler Flanged Outlet
No
Muffler Included
Yes
Muffler Inlet Connection
Slip-Fit
Muffler Inlet Inside Diameter
3.50
Muffler Inlet Location
Center
Muffler Inlet Outside Diameter
3.63
Muffler Outlet Connection
Slip-Fit
Muffler Outlet Diameter
3.50
Muffler Outlet Location
Center
Muffler Outlet Quantity
1
Muffler Quantity
1
Muffler Series
Flow FX
Muffler Type
Absorption
part type
Exhaust System
Pipe Color
Silver
Pipe Material
409 Stainless Steel
Product Type
Exhaust System
Sound Level
Aggressive / Moderate
Spring Bolt Kit Included
No
Sub Category
Exhaust and Tail Pipes
Tail Pipe Outlet Outside Diameter
3.50
Tail Pipe Quantity
1
Tail Pipe Tapered Outlet
No
Valve Included
No
Valve Type
Not Applicable
Warning
California Proposition 65
| Year | Make | Model | Body & Trim | Engine & Transmission |
|---|---|---|---|---|
Vehicle #1
Year
Make
Model
Body & Trim
Engine & Transmission
Shipping Policy
Operated by RevolutionParts Inc · Effective date: 11/2025 · Last updated: 4/2026... Check out our Shipping Policy for more details.
Return Policy
At PartsDirect.parts, operated by RevolutionParts Inc, we want you to be completely satisfied with your purchase. This policy outlines how to cancel orders, initiate returns, and receive refunds. Please read it carefully before completing your purchase... Check out our Return Policy for more details.