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Flowmaster

Flowmaster Outlaw Series Exhaust Systems 818112 System, Series, Cat-Back, Split Side Exit, Stainless Steel, Natural, Polished Tips, Chevy, GMC, Kit

SKU: FLO818112

Exhaust Systems
Flowmaster Outlaw Series Exhaust Systems 818112 System, Series, Cat-Back, Split Side Exit, Stainless Steel, Natural, Polished Tips, Chevy, GMC, Kit

Flowmaster

Flowmaster Outlaw Series Exhaust Systems 818112 System, Series, Cat-Back, Split Side Exit, Stainless Steel, Natural, Polished Tips, Chevy, GMC, Kit

SKU: FLO818112

Exhaust Systems
A$3,276.23
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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Description

IMPORTANT NOTICE: Will not fit models with 5th wheel tow hitch installed.

Flowmaster Outlaw Series exhaust systems are mandrel-bent for maximum performance and include specially designed mufflers. They deliver bold, dynamic interior and exterior tones for enthusiasts who covet the most aggressive components available. These systems include hardware and tips, where applicable--so installation is quick and easy. The kits are available in dozens of configurations for fitment on specific vehicles, including standard, crew, extended, and extended crew truck cabs; and long or short bed lengths. Order the Flowmaster Outlaw model designed for your application.

Part Type

Exhaust Systems

Data: v4.2 - Upd: 2026-10-14 03:45:53

Specifications

Product Attributes - Brand
Flowmaster
Product Attributes - Manufacturer's Part Number
818112
Product Attributes - Part Type
Exhaust Systems
Product Attributes - Product Line
Flowmaster Outlaw Series Exhaust Systems
Product Attributes - UPC
090127130162
Product Attributes - System Material
409 stainless steel
Product Attributes - System Style
Cat-back
Product Attributes - Exhaust Type
Single in/Dual out
Product Attributes - Exit Location
Split side
Product Attributes - System Finish
Natural
Product Attributes - Catalytic Converter(s) Included
No
Product Attributes - Intermediate Pipe Diameter (in.)
3.50 in.
Product Attributes - Muffler Included
Yes
Product Attributes - Muffler Quantity
One
Product Attributes - Muffler Configuration
Single inlet/Dual outlet
Product Attributes - Muffler Style
Chambered
Product Attributes - Muffler Material
409 stainless steel
Product Attributes - Muffler Finish
Black
Product Attributes - Hardware Included
Yes
Product Attributes - Tailpipe Diameter (in.)
3.00 in.
Product Attributes - Tip Included
Yes
Product Attributes - Tip Outlet Size (in.)
4.00
Product Attributes - Tip Quantity
2
Product Attributes - Tip Shape
Round
Product Attributes - Tip Cut
Slant
Product Attributes - Tip Edge Style
Rolled edge, double-wall
Product Attributes - Tip Material
304 stainless steel
Product Attributes - Tip Color
Polished
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold as a kit.
Product Attributes - Notes
Will not fit models with 5th wheel tow hitch installed.
Product Attributes - Special Attention
It is illegal to install parts or components that bypass, defeat, or render inoperative the manufacturers’ technology and design necessary to reduce vehicle emissions to meet state and federal Clean Air Act standards.

Reference Information

Brand Name/s Flowmaster
StreetFX SKU flo818112
SFX Item ID 4983525
Supplier Item Code 4983525
Manufacturer SKU 818112
Manufacturer UPC 90127130162
Alternative References FLM818112

Compatibility

Application Data
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelSLT
    Beginning Year2024
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    DrivetrainRWD
    Application Notes82.2in, 208.8cm; Extended Cab Pickup; 4WD; Flowmaster Outlaw Cat-Back Exhaust System
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelSLT
    Beginning Year2023
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    DrivetrainRWD
    Application Notes82.2in, 208.8cm; Crew Cab Pickup; 4WD; Flowmaster Outlaw Cat-Back Exhaust System
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelSLT
    Beginning Year2023
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    Drivetrain4WD
    Application Notes82.2in, 208.8cm; Crew Cab Pickup; 4WD
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelSLT
    Beginning Year2023
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    Drivetrain4WD
    Application Notes82.2in, 208.8cm; Extended Cab Pickup; RWD
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelSLT
    Beginning Year2023
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)82.2in, 208.8cm
    TransmissionAutomatic
    DrivetrainRWD
    Application Notes98.2in, 249.5cm; Extended Cab Pickup; 4WD; Flowmaster Outlaw Cat-Back Exhaust System
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelAT4
    Beginning Year2024
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID401
    CC6571
    Engine Size6.6L/401
    Engine FamilyChevy small block Gen V
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)82.2in, 208.8cm
    TransmissionAutomatic
    DrivetrainRWD
    Application Notes98.2in, 249.5cm; Extended Cab Pickup; 4WD
    RegionUnited States (USA)
    Engine VIN Code7
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelAT4
    Beginning Year2024
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID401
    CC6571
    Engine Size6.6L/401
    Engine FamilyChevy small block Gen V
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)82.2in, 208.8cm
    TransmissionAutomatic
    Drivetrain4WD
    Application Notes98.2in, 249.5cm; Extended Cab Pickup; RWD; Flowmaster Outlaw Cat-Back Exhaust System
    RegionUnited States (USA)
    Engine VIN Code7
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelAT4
    Beginning Year2024
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID401
    CC6571
    Engine Size6.6L/401
    Engine FamilyChevy small block Gen V
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)82.2in, 208.8cm
    TransmissionAutomatic
    Drivetrain4WD
    Application Notes98.2in, 249.5cm; Extended Cab Pickup; RWD
    RegionUnited States (USA)
    Engine VIN Code7
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelAT4
    Beginning Year2024
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID401
    CC6571
    Engine Size6.6L/401
    Engine FamilyChevy small block Gen V
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesN/R, N/R; Extended Cab Pickup; 4WD; Flowmaster Outlaw Cat-Back Exhaust System
    RegionUnited States (USA)
    Engine VIN Code7
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelAT4
    Beginning Year2022
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesN/R, N/R; Extended Cab Pickup; 4WD
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelAT4
    Beginning Year2022
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    Drivetrain4WD
    Application NotesN/R, N/R; Extended Cab Pickup; RWD; Flowmaster Outlaw Cat-Back Exhaust System
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelAT4
    Beginning Year2022
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    Drivetrain4WD
    Application NotesN/R, N/R; Extended Cab Pickup; RWD
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelSLT
    Beginning Year2022
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)82.2in, 208.8cm
    TransmissionAutomatic
    DrivetrainRWD
    Application Notes82.2in, 208.8cm; Standard Cab Pickup; 4WD; Flowmaster Outlaw Cat-Back Exhaust System
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelSLT
    Beginning Year2022
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)82.2in, 208.8cm
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesN/R, N/R; Crew Cab Pickup; 4WD; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelDENALI
    Beginning Year2022
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)82.2in, 208.8cm
    TransmissionAutomatic
    Drivetrain4WD
    Application NotesN/R, N/R; Crew Cab Pickup; 4WD; Flowmaster Outlaw Cat-Back Exhaust System; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelDENALI
    Beginning Year2022
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)82.2in, 208.8cm
    TransmissionAutomatic
    Drivetrain4WD
    Application NotesN/R, N/R; Crew Cab Pickup; RWD; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelDENALI
    Beginning Year2023
    Ending Year2023
    Engine TypeV8
    Liter6.6
    CID401
    CC6571
    Engine Size6.6L/401
    Engine FamilyChevy small block Gen V
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesN/R, N/R; Crew Cab Pickup; RWD; Flowmaster Outlaw Cat-Back Exhaust System; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN Code7
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelDENALI
    Beginning Year2023
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    Drivetrain4WD
    Application Notes82.2in, 208.8cm; Crew Cab Pickup; 4WD; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelDENALI
    Beginning Year2023
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    DrivetrainRWD
    Application Notes82.2in, 208.8cm; Crew Cab Pickup; 4WD; Flowmaster Outlaw Cat-Back Exhaust System; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelDENALI
    Beginning Year2023
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    Drivetrain4WD
    Application Notes82.2in, 208.8cm; Crew Cab Pickup; RWD; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN CodeY
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelDENALI
    Beginning Year2023
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID401
    CC6571
    Engine Size6.6L/401
    Engine FamilyChevy small block Gen V
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    DrivetrainRWD
    Application Notes82.2in, 208.8cm; Crew Cab Pickup; RWD; Flowmaster Outlaw Cat-Back Exhaust System; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN Code7
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelDENALI
    Beginning Year2020
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID401
    CC6571
    Engine Size6.6L/401
    Engine FamilyChevy small block Gen V
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    Drivetrain4WD
    Application Notes98.2in, 249.5cm; Crew Cab Pickup; 4WD; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN Code7
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelDENALI
    Beginning Year2020
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID401
    CC6571
    Engine Size6.6L/401
    Engine FamilyChevy small block Gen V
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    DrivetrainRWD
    Application Notes98.2in, 249.5cm; Crew Cab Pickup; 4WD; Flowmaster Outlaw Cat-Back Exhaust System; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN Code7
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelDENALI
    Beginning Year2020
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID401
    CC6571
    Engine Size6.6L/401
    Engine FamilyChevy small block Gen V
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    Drivetrain4WD
    Application Notes98.2in, 249.5cm; Crew Cab Pickup; RWD; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN Code7
  • MakeGMC
    ModelSIERRA 3500 HD
    SubmodelSLT
    Beginning Year2024
    Ending Year2021
    Engine TypeV8
    Liter6.6
    CID403
    CC6599
    Engine Size6.6L/403
    Engine FamilyDURAMAX V8 DIESEL
    Body StyleCab & Chassis
    Truck Bed Length in. (AAIA)98.2in, 249.5cm
    TransmissionAutomatic
    DrivetrainRWD
    Application Notes98.2in, 249.5cm; Crew Cab Pickup; RWD; Flowmaster Outlaw Cat-Back Exhaust System; FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
    RegionUnited States (USA)
    Engine VIN CodeY

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