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Hedman Standard Duty HTC Coated Full-Length Headers 1967-91 GM C/K/R/V Series Truck/SUV 396-454

500-66111

made in usa

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Hedman 66111
$668.99
Standard Duty HTC Coated Full-Length Headers
  • 1967-91 GM C/K/R/V Series Truck/SUV 396-454
  • 1-3/4" Tube, 3" Collector
  • Free Shipping - Ships directly from the manufacturer on 12/31/20
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    1977 GMC K25

    • Liter: 7.4
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: Yes; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Drivetrain: 4WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.
    • CUI: 454
    • Engine Type: V8 ( 7.4L / 454 )
    • Engine Vin: S

    1976 GMC K25 SUBURBAN

    • Liter: 4.8
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: Yes; Manual Transmission - Floor: Yes; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (160) Early chassis only.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (225) Designed for use with a Trans-Dapt throttle body spacer.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Footnotes: (5) With A.I.R. system.; Drivetrain: 4WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.
    • CUI: 292
    • Engine Type: L6 ( 4.8L / 292 )
    • Engine Vin: T

    1983 GMC C2500 SUBURBAN

    • Liter: 5
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: Yes; Manual Transmission - Floor: Yes; Footnotes: (45) Not legal for sale or use in California on pollution controlled motor vehicles.; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (160) Early chassis only.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (225) Designed for use with a Trans-Dapt throttle body spacer.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Drivetrain: 2WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.
    • CUI: 305
    • Engine Type: V8 ( 5L / 305 )
    • Engine Vin: H

    1977 GMC C25 SUBURBAN

    • Liter: 5.7
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: Yes; Manual Transmission - Floor: Yes; Footnotes: (45) Not legal for sale or use in California on pollution controlled motor vehicles.; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (160) Early chassis only.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (225) Designed for use with a Trans-Dapt throttle body spacer.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Drivetrain: 2WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.
    • CUI: 350
    • Engine Type: V8 ( 5.7L / 350 )
    • Engine Vin: L

    1968 GMC K25/K2500 SUBURBAN

    • Liter: 5.3
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: Yes; Manual Transmission - Floor: Yes; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (160) Early chassis only.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (225) Designed for use with a Trans-Dapt throttle body spacer.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Footnotes: (5) With A.I.R. system.; Drivetrain: 4WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.
    • CUI: 327
    • Engine Type: V8 ( 5.3L / 327 )
    • Engine Vin: -

    1982 CHEVROLET C20 SUBURBAN

    • Liter: 5.7
    • SubModel: CUSTOM
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: Yes; Manual Transmission - Floor: Yes; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (160) Early chassis only.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (225) Designed for use with a Trans-Dapt throttle body spacer.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Footnotes: (45) Not legal for sale or use in California on pollution controlled motor vehicles.; Drivetrain: 2WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.
    • CUI: 350
    • Engine Type: V8 ( 5.7L / 350 )
    • Engine Vin: M

    1973 CHEVROLET BLAZER

    • Liter: 5.7
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: Yes; Manual Transmission - Floor: Yes; Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (225) Designed for use with a Trans-Dapt throttle body spacer.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Footnotes: (45) Not legal for sale or use in California on pollution controlled motor vehicles.; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Drivetrain: 2WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.; Notes: 1/2 Ton, Full-sized only.
    • CUI: 350
    • Engine Type: V8 ( 5.7L / 350 )
    • Engine Vin: Y

    1974 CHEVROLET K20 SUBURBAN

    • Liter: 4.1
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: Yes; Manual Transmission - Floor: Yes; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (160) Early chassis only.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (225) Designed for use with a Trans-Dapt throttle body spacer.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Footnotes: (5) With A.I.R. system.; Drivetrain: 4WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.
    • CUI: 250
    • Engine Type: L6 ( 4.1L / 250 )
    • Engine Vin: Q

    1980 CHEVROLET C20 SUBURBAN

    • Liter: 5.7
    • SubModel: CUSTOM DELUXE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: Yes; Manual Transmission - Floor: Yes; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (160) Early chassis only.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (225) Designed for use with a Trans-Dapt throttle body spacer.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Footnotes: (45) Not legal for sale or use in California on pollution controlled motor vehicles.; Drivetrain: 2WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.
    • CUI: 350
    • Engine Type: V8 ( 5.7L / 350 )
    • Engine Vin: M

    1973 CHEVROLET BLAZER

    • Liter: 5.7
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: Yes; Manual Transmission - Floor: Yes; Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (225) Designed for use with a Trans-Dapt throttle body spacer.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Footnotes: (45) Not legal for sale or use in California on pollution controlled motor vehicles.; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Drivetrain: 2WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.; Notes: 1/2 Ton, Full-sized only.
    • CUI: 350
    • Engine Type: V8 ( 5.7L / 350 )
    • Engine Vin: V

    1978 GMC C35

    • Liter: 7.4
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: Yes; Manual Transmission - Floor: Yes; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (160) Early chassis only.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Footnotes: (45) Not legal for sale or use in California on pollution controlled motor vehicles.; Footnotes: (5) With A.I.R. system.; Drivetrain: 2WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.
    • CUI: 454
    • Engine Type: V8 ( 7.4L / 454 )
    • Engine Vin: S

    1976 GMC C25 SUBURBAN

    • Liter: 4.8
    • SubModel: BASE
    • Aspiration: NATURALLY ASPIRATED
    • Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: Yes; Manual Transmission - Floor: Yes; Footnotes: (45) Not legal for sale or use in California on pollution controlled motor vehicles.; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.; Footnotes: (112) Must use factory big block chevy hardware and mounts.; Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.; Footnotes: (160) Early chassis only.; Footnotes: (213) Elite replacement gasket 27550.; Footnotes: (225) Designed for use with a Trans-Dapt throttle body spacer.; Footnotes: (4) Includes parts necessary to retain emission devices. (50 State); Drivetrain: 2WD; E.O. Number: D167-27; Emissions Notes: 1974 and earlier vehicles WITH A.I.R.: These headers are legal for use on '74-earlier vehicles with A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed from vehicle.
    • CUI: 292
    • Engine Type: L6 ( 4.8L / 292 )
    • Engine Vin: T

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