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Flowmaster 818112 Outlaw Cat-Back Exhaust System with Super Muffler - 10

(2020-2026 Chevrolet Silverado 2500 HD; 2020-2026 Chevrolet Silverado 3500 HD; 2020-2026 GMC Sierra 2500 HD; 2020-2026 GMC Sierra 3500 HD)

Part of: Flowmaster Outlaw Cat-Back Exhaust System with Super Muffler

Other options in this family: Flowmaster 817689 Flowmaster 818168 Flowmaster 817936 Flowmaster 817981

Manufacturer

Picture for manufacturer Flowmaster

Part Number

818112
7 reviews
Sale Price

$1,049.95

In Stock (7)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Flowmaster 818112 Outlaw Cat-Back Exhaust System is engineered to deliver maximum performance and an aggressive exhaust note. Built with mandrel-bent 409 stainless steel tubing and featuring the iconic Super 10 Series muffler, this system provides significant power gains while adding a bold, custom appearance to your vehicle.

Performance Gains:

  • Increases up to 9 horsepower and 9 lb-ft of torque over stock exhaust at the rear wheels
  • Super 10 Series performance muffler delivers a deep, aggressive tone with improved exhaust flow
  • 3.50-inch and 3.00-inch mandrel-bent tubing maximizes exhaust velocity and scavenging

Construction and Design:

  • 16-gauge 409 stainless steel construction for long-lasting durability and corrosion resistance
  • Dual 4.00-inch polished stainless steel tips for a premium custom look
  • Configurable exit options—straight out the rear or side exit depending on your preference
  • Factory-styled hangers mount in stock locations for proper fitment

Installation:

  • Complete hardware kit included for straightforward bolt-on installation
  • Designed to work with stock mounting points and hangers
  • Backed by Flowmaster's Lifetime Limited Warranty

This cat-back system is ideal for enthusiasts seeking a more aggressive sound, noticeable performance improvements, and a distinctive appearance without sacrificing quality or durability.

Products specifications

Fits

2020-2026 Chevrolet Silverado 2500 HD; 2020-2026 Chevrolet Silverado 3500 HD; 2020-2026 GMC Sierra 2500 HD; 2020-2026 GMC Sierra 3500 HD

Inlet Inside Diameter

3.000 in.

Tubing Diameter

3.500 in.

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

California Proposition 65 Chemical Name

Nickel (Metallic)

California Proposition 65 Chemical Name

Chromium (hexavalent compounds)

Tip Diameter

4.000 in.

Tubing Diameter

3.000 in.

Material

409 Stainless Steel

Exhaust Type

Cat-Back

Brand

Flowmaster

Catalytic Converter Quantity

0

Category

Exhaust

Clamping Type

Flat Band

Clamps Included

Yes

Emission Code

5

Exhaust Series

Outlaw

Exhaust Tip Color

Silver

Exhaust Tip Connection

Clamp-On

Exhaust Tip Cut

Angled

Exhaust Tip Edge

Angle Cut

Exhaust Tip Finish

Polished

Exhaust Tip Intercooled

No

Exhaust Tip Material

304 Stainless Steel

Exhaust Tip Quantity

2

Exhaust Tip Resonated

No

Exhaust Tip Shape

Round

Exhaust Tip Wall

Double Wall

Exit Style

Dual Out Side

Exit Style

Dual Out Rear

Finish

Natural

Gasket Or Seal Included

No

Grade Type

Performance

Hangers Included

Yes

Inlet Type

Flanged

Mount Type

Uses Factory Hangers

Mounting Bracket Included

Yes

Muffler Body Length

6.50

Muffler Body Material

409 Stainless Steel

Muffler Body Shape

Oval

Muffler Color

Black

Muffler Finish

Black High-Temperature Paint Finish

Muffler Flanged Inlet

No

Muffler Flanged Outlet

No

Muffler Inlet Connection

Slip-Fit

Muffler Inlet Location

Center

Muffler Outlet Connection

Slip-Fit

Muffler Outlet Location

Dual

Muffler Outlet Quantity

2

Muffler Overall Length

12.375

muffler part number

Kit Only

Muffler Quantity

1

Muffler Series

10 Series

Muffler Type

Chambered

Pipe Color

Silver

Pipe Material

409 Stainless Steel

Product Type

Exhaust System

Sound Level

Aggressive

Spring Bolt Kit Included

No

Sub Category

Exhaust and Tail Pipes

Tail Pipe Quantity

Dual

Tail Pipe Quantity

2

Tail Pipe Tapered Outlet

No

Tip Logo

Embossed

Tip Style

Double wall

Type

Cat-Back

Valve Included

No

Valve Type

Not Applicable

Warning

California Proposition 65

Easy

I would like to be able to put in my apartment number

I love my BBK parts, especially the fact that they are American made. The only problem I had with this order was from FedEx. I never received any shipping information until they had been sitting at my driveway for 24 hours. I received a notice that they were shipped and delivered all in the same day.

Quick and easy to shop

User friendly site and competitive

Great prices, and had exactly what I needed.

Great!

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