Hedman Standard Duty HTC Coated Full-Length Headers 1963-82 Chevy Corvette 283-400
500-68306

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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 68306 fit your vehicle?
1976 CHEVROLET CORVETTE
- Liter: 5.7
- SubModel: STINGRAY
- 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Emissions Notes: RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: L
1966 CHEVROLET CORVETTE
- 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
- CUI: 327
- Engine Type: V8 ( 5.3L / 327 )
- Engine Vin: -
1973 CHEVROLET CORVETTE
- 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: L
1965 CHEVROLET CORVETTE
- 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
- CUI: 327
- Engine Type: V8 ( 5.3L / 327 )
- Engine Vin: -
1968 CHEVROLET CORVETTE
- Liter: 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
- CUI: 427
- Engine Type: V8 ( 7L / 427 )
- Engine Vin: -
1969 CHEVROLET CORVETTE
- Liter: 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
- CUI: 427
- Engine Type: V8 ( 7L / 427 )
- Engine Vin: -
1974 CHEVROLET CORVETTE
- 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: T
1972 CHEVROLET CORVETTE
- 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: L
1974 CHEVROLET CORVETTE
- Liter: 7.4
- 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: Y
1982 CHEVROLET CORVETTE
- Liter: 5.7
- SubModel: COLLECTOR'S EDITION
- 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Emissions Notes: RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: 8
1977 CHEVROLET CORVETTE
- 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.; Emissions Notes: RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
- CUI: 350
- Engine Type: V8 ( 5.7L / 350 )
- Engine Vin: L
1968 CHEVROLET CORVETTE
- 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: Yes; Footnotes: (1) Without smog injection or injection heads.; Footnotes: (100) Will not fit steering damper inside front crossmember.; Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).; Emissions Notes: 1974 and earlier vehicles WITHOUT A.I.R.: Legal for use on '74-earlier vehicles without A.I.R.. Considered OEM replacement part, and do not require EO, when existing emission controls are not removed.
- CUI: 327
- Engine Type: V8 ( 5.3L / 327 )
- Engine Vin: -
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.