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Flowtech Headers 91843-1FLT Headers, Shorty, Steel, Ceramic Coated, Chevy, GMC, Pickup, 4.8, 5.3L, Pair

SKU: BIG91843-1FLT

Headers

Flowtech Headers 91843-1FLT Headers, Shorty, Steel, Ceramic Coated, Chevy, GMC, Pickup, 4.8, 5.3L, Pair

SKU: BIG91843-1FLT

Headers

Sale ends in Calculating...

A$1,581.83 A$1,930.44
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

Flowtech headers are designed to provide optimum exhaust flow for increased horsepower, torque, fuel economy, and improved throttle response. Leak-tested for maximum performance, they feature the industry's best welds for durability and are carefully engineered for precise fit. Available for a wide range of applications, they're offered in block hugger, competition, fenderwell, lakester, long tube, mid-length, shorty, upright, and turbo styles. Varying with the application, Flowtech headers are constructed from sturdy and lightweight cold-rolled mild steel or stainless steel for increased strength and durability. All tubing is mandrel-bent to provide consistent tubing diameter for smooth flow and increased exhaust velocity. Extra-thick, machined header flanges provide a leak-free seal and maximum strength. For long-term rust and corrosion-resistance, available finishes include natural and polished stainless steel, high heat-resistant black paint, or a satin silver metallic ceramic thermal barrier coating. All mounting hardware and premium gaskets are included.

Important notes: Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Hooker recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage. Flowtech does not recommend the use of header wraps as this will void the warranty.

Part Type

Headers

Data: v4.2 - Upd: 2026-10-11 02:18:37

Specifications

Product Attributes - Brand
Flowtech
Product Attributes - Manufacturer's Part Number
91843-1FLT
Product Attributes - Part Type
Headers
Product Attributes - Product Line
Flowtech Headers
Product Attributes - UPC
090127688731
Product Attributes - Header Style
Shorty
Product Attributes - Header Material
Steel
Product Attributes - Primary Tube Outside Diameter (in.)
1 5/8 in.
Product Attributes - Header Color
Silver ceramic coated
Product Attributes - Flange Style
Standard
Product Attributes - Weld-Up
No
Product Attributes - Collector Attachment
Stock flange
Product Attributes - Collector Diameter (in.)
2.50
Product Attributes - Collector Reducers Included
No
Product Attributes - Tuned
No
Product Attributes - Primary Tube Gauge
16-gauge
Product Attributes - Flange Thickness (in.)
0.38 in.
Product Attributes - Bolts/Studs Included
No
Product Attributes - Gaskets Included
Yes
Product Attributes - Crossover Pipe Included
No
Product Attributes - Catalytic Converter(s) Included
No
Product Attributes - Motor Mounts Included
No
Product Attributes - Transmission Mount Included
No
Product Attributes - Quantity
Sold as a pair.
Product Attributes - CARB EO Number(s)
D-115-20
Product Attributes - Emissions
California EO Approved

Reference Information

Brand Name/s Flowtech
StreetFX SKU big91843-1FLT
SFX Item ID 5092265
Supplier Item Code 5092265
Manufacturer SKU 91843-1FLT
Manufacturer UPC 90127688731
Alternative References 5.3L

Compatibility

Application Data
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelBASE
    Beginning Year2002
    Ending Year2004
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Engine VIN CodeT
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelBASE
    Beginning Year2002
    Ending Year2004
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Engine VIN CodeT
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelBASE
    Beginning Year2002
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelBASE
    Beginning Year2002
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelLS
    Beginning Year2005
    Ending Year2006
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelLS
    Beginning Year2005
    Ending Year2006
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelLT
    Beginning Year2005
    Ending Year2006
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelLT
    Beginning Year2005
    Ending Year2006
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelNORTH FACE
    Beginning Year2002
    Ending Year2003
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Engine VIN CodeT
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelNORTH FACE
    Beginning Year2002
    Ending Year2003
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelON ROAD EDITION
    Beginning Year2002
    Ending Year2003
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Engine VIN CodeT
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelON ROAD EDITION
    Beginning Year2002
    Ending Year2003
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelWBH
    Beginning Year2003
    Ending Year2003
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Engine VIN CodeT
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelWBH
    Beginning Year2003
    Ending Year2003
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Engine VIN CodeT
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelWBH
    Beginning Year2003
    Ending Year2003
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelWBH
    Beginning Year2003
    Ending Year2003
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelZ66
    Beginning Year2004
    Ending Year2004
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Engine VIN CodeT
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelZ66
    Beginning Year2004
    Ending Year2006
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelZ71
    Beginning Year2002
    Ending Year2004
    Engine TypeV8
    Liter5.3
    CID325
    CC5328
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Engine VIN CodeT
  • MakeCHEVROLET
    ModelAVALANCHE 1500
    SubmodelZ71
    Beginning Year2002
    Ending Year2006
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE
    SubmodelBLACK DIAMOND LS
    Beginning Year2013
    Ending Year2013
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE
    SubmodelBLACK DIAMOND LS
    Beginning Year2013
    Ending Year2013
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE
    SubmodelBLACK DIAMOND LT
    Beginning Year2013
    Ending Year2013
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE
    SubmodelBLACK DIAMOND LT
    Beginning Year2013
    Ending Year2013
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    ModelAVALANCHE
    SubmodelBLACK DIAMOND LTZ
    Beginning Year2013
    Ending Year2013
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes

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