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Specifications:
| Description_DEF | [B@5608601c |
| Description_DES | [B@633f67e |
| Description_EXT | [B@511fa99b |
| Description_FAB | [B@492d2d0d |
| Description_FAB | [B@5c30acb4 |
| Description_FAB | [B@45a9214a |
| Description_FAB | [B@69d60b15 |
| Description_FAB | [B@49b30667 |
| Description_FAB | [B@103f56e9 |
| Description_INV | [B@1c9096d5 |
| Description_SHO | [B@45c7a8f1 |
| Cylinder Head | Stock Profile Heads |
| Title | HEDMAN HEDDERS STANDARD UNCOATED HEADERS; 1-3/4 IN. TUBE DIA.; 3 IN. COLL.; MID-LENGTH DESIGN |
| Material | Mild Steel |
| Tube Design | Standard |
| Tube Length | Mid-Length Tubes |
| Tube Diameter | 1-3/4 in. |
| Reducers Included | 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 |
| Y-Pipe Included | No |
| Variations | 66007 HTC Coated Model |
| Quantity | Sold as a pair. |
| Primary Tube Gauge | 16g |
| Primary Tube Diameter (in) | 1.75 in. |
| Package Contents | Headers, ball and socket reducers (exhaust adapters), gaskets, mounting hardware |
| Header Material | Mild Steel |
| Header Finish | Uncoated |
| Cylinder Head Port Shape | Rectangle |
| Header Construction | MILD STEEL- Standard-Duty |
| Replacement Gasket | 27560 |
| Replacement Head Flange Gasket | 27560 |
| California Proposition 65 | WARNING: Cancer. For more info visit www.P65Warnings.ca.gov |
| with A.I.R. System | No |
| Tube Size | 1-3/4 in. |
| Tube Style | Mid-Length |
| Air Conditioning | Yes |
| Automatic Transmission - Column | No |
| Automatic Transmission - Floor | Yes |
| Manual Transmission - Column | No |
| Manual Transmission - Floor | Yes |
| Tube Material Thickness | 16g |
| Flange Thickness | 0.3125 in. |
| Exhaust System Dia | 2-1/2 in. |
| Reducer Outlet Size | 2-1/2 in. |
| Collector Attachment | 3 in. |
| Collector Diameter | 3 in. |
| Collector Size | 3 in. |
| Notes | 55-57 Chevy Car 283-400 |
| Collector Style | BALL and SOCKET Style (Gasketless) |
| Contents | Header(s), new bolts, gasket(s) to head, reducer(s) and hardware, instructions |
| Header Style | Mid-Length Tube |
| E.O. # | No |
| Emissions Notes | Not Legal For Street Use on '75-Later Model Years! Legal for off-road use only. |
| Header Port Shape | Rectangle |
| Port Shape | Rectangle |
| Flange Style | Standard |
| Finish | Uncoated |
| Finish Type | UNCOATED Mild Steel! Shipped with Temporary Paint. |
| Power Steering | Yes |