Hedman 68447
Exhaust Headers
NOTE: The paint applied to these headers is a temporary coating only and is designed to burn off during use. High temperature paint or other high temperature coatings are recommended.
Application:
Chevrolet
1987-1991 Corvette
Specification
| Tube Diameter | 1-5/8 in. |
|---|---|
| Tube Style | Long Tubes |
| Collector Style | BALL and SOCKET Style (Gasketless) |
| Air Conditioning | Yes |
| Automatic Transmission - Column | No |
| Automatic Transmission - Floor | Yes |
| Manual Transmission - Column | No |
| Manual Transmission - Floor | Yes |
| Collector Attachment | 3 in. |
| Collector Diameter | 3 in. |
| Collector Size | 3 in. |
| Reducer Outlet Size | 2-1/2 in. |
| Exhaust System Diameter | 2-1/2 in. |
| Contents | Header(s), new bolts, gasket(s) to head, reducer(s) and hardware, instructions |
| E.O. # | Yes |
| Emissions Notes | EO# D167-33 (click here for covered vehicles in document on ARB.CA.GOV website) |
| Finish | Uncoated |
| Finish Type | UNCOATED Mild Steel! Shipped with Temporary Paint. |
| Flange Style | Standard |
| Flange Thickness | 0.3125 in. |
| Header Port Shape | Round |
| Header Style | Long Tube |
| Notes | 87-91 Chevrolet Corvette 283-400 |
| Key Feature | With A.I.R. |
| Port Shape | Round |
| Power Steering | Yes |
| Material | Mild Steel |
| Tube Design | Standard |
| Tube Length | Long Tubes |
| Tube Material Thickness | 16g |
| Tube Size | 1-5/8 in. |
| Variations | 66447, 68487 |
| Installation Notes | EGR Gasket Not Included! Must purchase AC Delco #219-590 or GM #19236589 |
| With A.I.R. System | Yes |
| With EGR | No |
| Weld-Up | No |
| Tuned | No |
| Bolts/Studs Included | Yes |
| Catalytic Converter(s) Included | No |
| Collector Bolts Included | Yes |
| Crossover Pipe Included | No |
| Gasket or Seal Included | Yes |
| Header Fasteners Included | Yes |
| Installation Hardware Included | Yes |
| Motor Mounts Included | No |
| Mounting Hardware Included | Yes |
| Reducers Included | Yes |
| Y-Pipe Included | No |
| Quantity | Sold as a pair. |
| Primary Tube Gauge | 16g |
| Primary Tube Diameter | 1.625 in. |
| Package Contents | Headers, ball and socket reducers (exhaust adapters), gaskets, mounting hardware |
| Header Material | Mild Steel |
| Header Finish | Uncoated |
| Cylinder Head Port Shape | Round |
| Cylinder Head | Stock Profile Heads |
| Header Construction | MILD STEEL- Standard-Duty |
| Replacement Gasket | 27500 |
| Replacement Head Flange Gasket | 27500 |
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