Hedman Standard Duty HTC Coated Shorty Headers 1964-94 GM Passenger Car 283-400
500-66601

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Hedman Hedders has been manufacturing quality headers in the USA since 1954, and they've been manufacturing long and MID-LENGTH tube headers for Pontiac models for decades. Each set uses mild steel, smooth flowing, CNC mandrel bent tubes, that are hand-welded to ensure each pair is identical to the next. Hedman's unique, gasketless ball and socket collector design allows your vehicle's exhaust system to bolt up, even if it is not perfectly aligned with the header collectors. These headers have a high temperature POLISHED-SILVER ceramic finish that resists corrosion, and can withstand temperatures up to 1400 degree F. Each set includes a pair of header gaskets, header flange bolts and collector bolts. No collector gasket is needed. Hedman Hedders is so confident in the quality of its headers that these headers are factory backed by a Limited Lifetime Warranty. Made in the USA Features: NOTE: Installing coated headers on an engine during the break-in period will cause discoloration. The use of factory manifolds or an old set of headers is recommended while breaking in an engine.
Does Hedman 66601 fit your vehicle?
1974 CHEVROLET EL CAMINO
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: 1970 or later only- A/C equipped vehicles require bracket 20110.(Large piston compressor).; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (49) Will not fit (Saginaw) close ratio P/S with 825 power steering box, 1967-69.; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; 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.; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 400
- Engine Type: V8 ( 6.6L / 400 )
- Engine Vin: R
1976 CHEVROLET EL CAMINO
- Liter: 5.7
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: 1970 or later only- A/C equipped vehicles require bracket 20110.(Large piston compressor).; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: Will not fit (Saginaw) close ratio P/S with 825 power steering box.; E.O. Number: D167-27; Emissions Notes: 50 State Legal (street legal) Headers per vehicle listing on C.A.R.B. EO D167-27; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: L
1974 CHEVROLET BEL AIR
- Liter: 5.7
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: 1970 or later only- A/C equipped vehicles require bracket 20110.(Large piston compressor).; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: Will not fit (Saginaw) close ratio P/S with 825 power steering box.; 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.; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: K
1977 CHEVROLET MALIBU
- Liter: 5
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: 1970 or later only- A/C equipped vehicles require bracket 20110.(Large piston compressor).; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: Will not fit (Saginaw) close ratio P/S with 825 power steering box.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; E.O. Number: D167-27; Emissions Notes: 50 State Legal (street legal) Headers per vehicle listing on C.A.R.B. EO D167-27; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 305
- Engine Type: V8 ( 5L / 305 )
- Engine Vin: U
1969 CHEVROLET EL CAMINO
- Liter: 5.3
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: 1970 or later only- A/C equipped vehicles require bracket 20110.(Large piston compressor).; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (49) Will not fit (Saginaw) close ratio P/S with 825 power steering box, 1967-69.; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; 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.; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 327
- Engine Type: V8 ( 5.3L / 327 )
- Engine Vin: -
1974 CHEVROLET CAPRICE
- Liter: 5.7
- SubModel: CLASSIC
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: 1970 or later only- A/C equipped vehicles require bracket 20110.(Large piston compressor).; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: Will not fit (Saginaw) close ratio P/S with 825 power steering box.; 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.; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: K
1981 CHEVROLET CAMARO
- Liter: 5
- SubModel: BERLINETTA
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: Will not fit 1967-69 Camaros with A/C. - 1970 or later only- A/C equipped vehicles require bracket 20110.(Large piston compressor).; Power Steering: Yes; Auto Transmission - Column: No; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (49) Will not fit (Saginaw) close ratio P/S with 825 power steering box, 1967-69.; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; E.O. Number: D167-33; Emissions Notes: 50 State Legal (street legal) Headers per vehicle listing on C.A.R.B. EO D167-33; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 305
- Engine Type: V8 ( 5L / 305 )
- Engine Vin: H
1981 PONTIAC GRAND PRIX
- Liter: 4.3
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: Yes; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; E.O. Number: D167-33; Emissions Notes: 50 State Legal (street legal) Headers per vehicle listing on C.A.R.B. EO D167-33; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 265
- Engine Type: V8 ( 4.3L / 265 )
- Engine Vin: S
1973 CHEVROLET CHEVELLE
- Liter: 5.7
- SubModel: DELUXE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: 1970 or later only- A/C equipped vehicles require bracket 20110.(Large piston compressor).; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (49) Will not fit (Saginaw) close ratio P/S with 825 power steering box, 1967-69.; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; 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.; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: K
1973 CHEVROLET BEL AIR
- Liter: 5.7
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: 1970 or later only- A/C equipped vehicles require bracket 20110.(Large piston compressor).; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: Will not fit (Saginaw) close ratio P/S with 825 power steering box.; 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.; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: T
1972 CHEVROLET CAPRICE
- Liter: 5.7
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: 1970 or later only- A/C equipped vehicles require bracket 20110.(Large piston compressor).; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: Will not fit (Saginaw) close ratio P/S with 825 power steering box.; 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.; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: L
1972 CHEVROLET BISCAYNE
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- Fitment Notes: Air Conditioning: 1970 or later only- A/C equipped vehicles require bracket 20110.(Large piston compressor).; Power Steering: Yes; Auto Transmission - Column: Yes; Auto Transmission - Floor: Yes; Manual Transmission - Column: No; Manual Transmission - Floor: No; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (5) With A.I.R. system.; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Footnotes: Will not fit (Saginaw) close ratio P/S with 825 power steering box.; 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.; Engine Family: SB Chevy 283-400 (Gen 1)
- CUI: 400
- Engine Type: V8 ( 6.6L / 400 )
- Engine Vin: R
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