Home / Shop / Hedman Street Headers 68666 Headers, Street, Mid-Length, Steel, Silver Ceramic Coated, Chevy, Big Block, Pair

Hedman Street Headers 68666 Headers, Street, Mid-Length, Steel, Silver Ceramic Coated, Chevy, Big Block, Pair

SKU: HED68666

Headers

Hedman Hedders

Hedman Street Headers 68666 Headers, Street, Mid-Length, Steel, Silver Ceramic Coated, Chevy, Big Block, Pair

SKU: HED68666

Headers

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 09:14:40

Specifications

Product Attributes - Brand: Hedman Hedders
Product Attributes - Manufacturer's Part Number: 68666
Product Attributes - Part Type: Headers
Product Attributes - Product Line: Hedman Street Headers
Product Attributes - UPC: 732611686662
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: Ball and socket flange
Product Attributes - Collector Diameter (in.): 3.00
Product Attributes - Collector Reducers Included: Yes
Product Attributes - Collector Reducer Exit Diameter: 2.500 in.
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: 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.

Reference Information

Brand Name/s	Hedman Hedders
StreetFX SKU	hed68666
SFX Item ID	5071099
Supplier Item Code	5071099
Manufacturer SKU	68666
Manufacturer UPC	732611686662

Compatibility

Application Data

Make	CHEVROLET
Model	CHEVELLE
Beginning Year	1964
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Gen V
Engine Size	7.4L/454
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	CHEVELLE
Beginning Year	1964
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Gen VI
Engine Size	7.4L/454
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	CHEVELLE
Beginning Year	1964
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Gen VI
Engine Size	8.2L/502
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	CHEVELLE
Beginning Year	1964
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	6.6L/402
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	CHEVELLE
Beginning Year	1964
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	7.0L/427
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	CHEVELLE
Beginning Year	1964
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	7.4L/454
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	CHEVELLE
Beginning Year	1965
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	6.5L/396
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1964
Ending Year	1964
Engine Type	V8
Engine Family	Chevy big block Gen V
Engine Size	7.4L/454
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1964
Ending Year	1964
Engine Type	V8
Engine Family	Chevy big block Gen VI
Engine Size	7.4L/454
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1964
Ending Year	1964
Engine Type	V8
Engine Family	Chevy big block Gen VI
Engine Size	8.2L/502
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1964
Ending Year	1964
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	6.6L/402
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1964
Ending Year	1964
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	7.0L/427
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1964
Ending Year	1964
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	7.4L/454
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1966
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Gen V
Engine Size	7.4L/454
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1966
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Gen VI
Engine Size	7.4L/454
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1966
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Gen VI
Engine Size	8.2L/502
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1966
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	6.5L/396
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1966
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	6.6L/402
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1966
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	7.0L/427
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	EL CAMINO
Beginning Year	1966
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	7.4L/454
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	MALIBU
Beginning Year	1964
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Gen V
Engine Size	7.4L/454
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	MALIBU
Beginning Year	1964
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Gen VI
Engine Size	7.4L/454
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	MALIBU
Beginning Year	1964
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Gen VI
Engine Size	8.2L/502
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	MALIBU
Beginning Year	1964
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	6.6L/402
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

Make	CHEVROLET
Model	MALIBU
Beginning Year	1964
Ending Year	1967
Engine Type	V8
Engine Family	Chevy big block Mark IV
Engine Size	7.0L/427
Drivetrain	RWD
Power Steering	Yes
Power Brakes (application)	Yes
Air Conditioning	No
Standard Transmission Column Shift	No
Standard Transmission Floor Shift	No
Automatic Transmission Column Shift	No
Automatic Transmission Floor Shift	Yes
Footnotes	1 - Without smog injection or injection heads. 20 - Designed to fit factory cylinder heads. If aftermarket cylinder heads are being used, it is the installers responsibility to verify fit before purchase. 45 - Not legal for sale or use in California on pollution-controlled motor vehicles. 49 - Will not fit Saginaw close ratio power steering with 825 power steering box.

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Hedman Street Headers 68666 Headers, Street, Mid-Length, Steel, Silver Ceramic Coated, Chevy, Big Block, Pair

Hedman Street Headers 68666 Headers, Street, Mid-Length, Steel, Silver Ceramic Coated, Chevy, Big Block, Pair

Description

Part Type

Specifications

Reference Information

Compatibility

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