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Vehicle Info NeededHEDMANPART NUMBER: 500-66447
Standard Duty HTC Coated Full-Length Headers 1987-91 Chevy Corvette 283-400
$53299
Ships on 11/17/2026
Lowest Price GuaranteeGM Cars
- Standard Duty HTC Coated Full-Length Headers
- 1987-91 Chevy Corvette 283-400
- 1-5/8" Tube, 3" Collector
- Will fit angle plug heads (Chevy aluminum only)
- Must modify rotary A/C bracket
- With EGR
- Includes parts necessary to retain 50-state emission devices
- Not legal for sale or use in California
- With A.I.R. system
- Modification to stock exhaust required to retain catalytic converter
- Not applicable or intended for street or highway use (legal only for racing vehicles which may never be used on a highway)
Part TypeHeader
BrandHEDMAN
Package Height9.5
Package Width18.5
Package Length39.0
Weight27.0 PG
Part CategoryPerformance Parts
Header FinishSilver ceramic coated
Tube DirectionDown Swept
QuantitySold as a pair
Bolts/Studs IncludedYes
Cylinder Head Port ShapeOval
Transmission Mount IncludedNo
Header MaterialSteel
Gaskets IncludedYes
Weld-UpNo
Collector AttachmentBall and socket flange
Flange StyleStandard
TunedNo
Collector Diameter3 in (76.2 mm)
Motor Mounts IncludedNo
Part FitmentSemi Universal
Reducers IncludedYes
ApplicationAutomotive
Primary Tube Gauge18-gauge
Header StyleFull-length
Cross Over Pipe IncludedNo
Catalytic Converter(S) IncludedNo
Primary Tube Diameter1.625 in (41.3 mm)
Vendor Part Number66447
Package Qty1
Package TypeEA
No Questions
No Reviews
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Some parts are not legal for use in California or other states with similar laws / regulations
