Overview:
This Flowmaster® Flow FX® cat-back exhaust system for the 2020-2025 GM 2500HD/3500HD trucks with the 6.6-liter gas engine is manufactured using durable 409 stainless steel throughout and features 3.50 to dual 3.00-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 +9 hp and +10 lb-ft at the rear wheels. This system exits out both sides, behind the rear wheels with 4.50-inch black ceramic tips 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. Backed by Flowmaster’s Lifetime Limited Warranty.
Features:
Max increases of up to 11 hp and 15 lb-ft over the stock exhaust at the rear wheels
3.50 to dual 3.00-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
4.50-Inch black ceramic coated tips add a custom look to the truck
Includes complete hardware and factory styled hangers in the stock locations for an easy installation
Flow FX “straight through” performance muffler delivers a deep, aggressive to moderate performance tone and improves exhaust flow
Specs:
Brand: Flowmaster
CARB (California) Compliant: Yes
Catalytic Converter Included: No
Catalytic Converter Quantity: 0
Clamping Type: Flat Band
Clamps Included: Yes
Emission Code: 5
Exhaust Series: Flow FX
Exhaust Tip Color: Black
Exhaust Tip Connection: Clamp-On
Exhaust Tip Cut: Angled
Exhaust Tip Edge: Rolled Edge
Exhaust Tip Finish: Black Ceramic Coating
Exhaust Tip Material: 304 Stainless Steel
Exhaust Tip Quantity: 2
Exhaust Tip Shape: Round
Exhaust Tip Wall: Single Wall
Exit Style: Dual Out Side
Finish: Natural
Gasket Or Seal Included: No
Grade Type: Performance
Hangers Included: Yes
Inlet Type: Flanged
Main Piping Diameter: 3
Mount Type: Uses Factory Hangers
Mounting Bracket Included: No
Muffler Body Height: 5
Muffler Body Length: 18
Muffler Body Material: 409 Stainless Steel
Muffler Body Shape: Oval
Muffler Body Width: 10
Muffler Color: Silver
Muffler Finish: Natural
Muffler Flanged Inlet: No
Muffler Flanged Outlet: No
Muffler Included: Yes
Muffler Inlet Connection: Slip-Fit
Muffler Inlet Inside Diameter: 3.5
Muffler Inlet Location: Center
Muffler Inlet Outside Diameter: 3.63
Muffler Outlet Connection: Slip-Fit
Muffler Outlet Diameter: 3
Muffler Outlet Location: Dual
Muffler Outlet Quantity: 2
Muffler Overall Length: 24
Muffler Part Number: Kit Only
Muffler Quantity: 1
Muffler Series: Flow FX
Muffler Type: Absorption
Pipe Color: Silver
Pipe Material: 409 Stainless Steel
Sound Level: Moderate
Spring Bolt Kit Included: No
Tail Pipe Outlet Outside Diameter: 3
Tail Pipe Quantity: 2
Tail Pipe Tapered Outlet: No
Tip Logo: Embossed
Type: Cat-Back
Valve Included: No
Valve Type: Not Applicable
Part Number: 718111
Applications:
- 2020-2026 Chevrolet Silverado 2500 HD 401 CID
- 2020-2026 Chevrolet Silverado 3500 HD 401 CID
- 2020-2026 GMC Sierra 2500 HD 401 CID
- 2020-2026 GMC Sierra 3500 HD 401 CID
Emissions:
- This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.
