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Hedman Street Headers 66571 Headers, Street, Mid-Length, Steel, Silver Ceramic Coated, Chevy, GMC, 7.4L, 454, Kit

SKU: HED66571

Headers

Hedman Street Headers 66571 Headers, Street, Mid-Length, Steel, Silver Ceramic Coated, Chevy, GMC, 7.4L, 454, Kit

SKU: HED66571

Headers
A$2,066.50
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

For the price, no other part can give you the horsepower and fuel economy improvements of Hedman headers. They make Hedman Street headers so well that they guarantee them to be free from defects--including cracks in the tubes and welds--for the life of the headers. Hedman Street headers are available uncoated or in Black Maxx or their polished HTC thermal ceramic coated finishes and, as an added bonus, they also come with all necessary gaskets and mounting hardware. Unless otherwise noted, these headers are designed to fit the vehicle as it came from the manufacturer. This includes components like cylinder heads, chassis, steering, motor mounts, body mounts, and bushings, etc. If your vehicle is using aftermarket components, parts from other applications, or custom-altered parts, then it is the installer's responsibility to verify fitment.

Special warning regarding Hedman painted headers only. The paint on these headers is not designed as a final finish; it is designed to protect the headers after the manufacturing process and during shipping. This paint will not withstand the high heat associated with engine break-in, nor will it withstand the heat cycles associated with any type of driving. It is recommended that this protective coating be stripped, and a high heat paint or coating designed for use on headers be applied.

Part Type

Headers

Data: v4.2 - Upd: 2026-10-14 09:16:33

Specifications

Product Attributes - Brand
Hedman Hedders
Product Attributes - Manufacturer's Part Number
66571
Product Attributes - Part Type
Headers
Product Attributes - Product Line
Hedman Street Headers
Product Attributes - UPC
732611665711
Product Attributes - Header Style
Mid-length
Product Attributes - Header Material
Steel
Product Attributes - Primary Tube Outside Diameter (in.)
1 3/4 in.
Product Attributes - Header Color
Silver ceramic coated
Product Attributes - Flange Style
Standard
Product Attributes - Weld-Up
No
Product Attributes - Cylinder Head Port Shape
Square
Product Attributes - Collector Attachment
Stock flange
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
Yes
Product Attributes - Gaskets Included
Yes
Product Attributes - Crossover Pipe Included
Yes
Product Attributes - Crossover Pipe Style
Y-pipe
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 kit.
Product Attributes - Notes
For use on models with A.I.R.
Product Attributes - CARB EO Number(s)
D-167-33
Product Attributes - Emissions
California EO Approved

Reference Information

Brand Name/s Hedman Hedders
StreetFX SKU hed66571
SFX Item ID 5069913
Supplier Item Code 5069913
Manufacturer SKU 66571
Manufacturer UPC 732611665711
Alternative References 7.4L

Compatibility

Application Data
  • MakeCHEVROLET
    ModelC2500 SUBURBAN
    SubmodelBASE
    Beginning Year1992
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelC2500 SUBURBAN
    SubmodelLS
    Beginning Year1995
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelC2500 SUBURBAN
    SubmodelLT
    Beginning Year1995
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelC2500 SUBURBAN
    SubmodelSILVERADO
    Beginning Year1992
    Ending Year1994
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelC3500
    SubmodelBASE
    Beginning Year1994
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelC3500
    SubmodelCHEYENNE
    Beginning Year1991
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelC3500
    SubmodelSILVERADO
    Beginning Year1991
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelK2500 SUBURBAN
    SubmodelBASE
    Beginning Year1992
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelK2500 SUBURBAN
    SubmodelLS
    Beginning Year1995
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelK2500 SUBURBAN
    SubmodelLT
    Beginning Year1995
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelK2500 SUBURBAN
    SubmodelSILVERADO
    Beginning Year1992
    Ending Year1994
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelK3500
    SubmodelBASE
    Beginning Year1994
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelK3500
    SubmodelCHEYENNE
    Beginning Year1991
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelK3500
    SubmodelSILVERADO
    Beginning Year1991
    Ending Year1995
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelR30
    SubmodelCHEYENNE
    Beginning Year1988
    Ending Year1988
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelR30
    SubmodelSCOTTSDALE
    Beginning Year1988
    Ending Year1988
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelR30
    SubmodelSILVERADO
    Beginning Year1988
    Ending Year1988
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelR3500
    SubmodelCHEYENNE
    Beginning Year1989
    Ending Year1990
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelR3500
    SubmodelCHEYENNE
    Beginning Year1991
    Ending Year1991
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelR3500
    SubmodelSCOTTSDALE
    Beginning Year1989
    Ending Year1990
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelR3500
    SubmodelSILVERADO
    Beginning Year1989
    Ending Year1990
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelR3500
    SubmodelSILVERADO
    Beginning Year1991
    Ending Year1991
    Engine TypeV8
    Engine FamilyChevy big block Gen V
    Engine Size7.4L/454
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelV30
    SubmodelCHEYENNE
    Beginning Year1988
    Ending Year1988
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelV30
    SubmodelSCOTTSDALE
    Beginning Year1988
    Ending Year1988
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.
  • MakeCHEVROLET
    ModelV30
    SubmodelSILVERADO
    Beginning Year1988
    Ending Year1988
    Engine TypeV8
    Engine FamilyChevy big block Mark IV
    Engine Size7.4L/454
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    FootnotesX - Check CARB E.O. for your specific application. 4 - Includes parts necessary to retain emission devices. 5 - With A.I.R. system. 15 - Reduced length header to provide maximum ground clearance. 38 - 16-gauge tubing. 144 - Complete with single Y-Pipe to single catalytic converter.

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