Description
Hedman Hedders has been manufacturing quality headers in the USA since 1954, and they’ve been manufacturing Ford truck headers 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 exhaust system to bolt up to these Ford 351M/400 headers, even if it is not perfectly aligned with the header collectors.
These uncoated, LONG-TUBE, fenderwell-exit headers fit 1977-79 Ford 1/2, 3/4 and 1 ton, 4WD Trucks and Broncos with a 351m or 400 engine. The long, smooth-flowing 1-5/8 in. tube design provides great exhaust flow to let your Ford truck or Bronco’s 351M of 400 engine breathe easy, and produce loads of torque. They fit both automatic and manual transmission vehicles.
These headers are uncoated, and ship from the factory with a temporary black paint that will burn off when submitted to normal operating temperatures. For protection against the element and lower underhood temperatures, these headers are also available with a silver or black ceramic-metallic finish.
Each set includes a pair of 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.
Specifications:
| Bolts/Studs Included | Yes |
| Gasket Or Seal Included | Yes |
| Reducers Included | Yes |
| Air Conditioning | Yes |
| Automatic Transmission – Column | Yes |
| Automatic Transmission – Floor | Yes |
| Collector Size | 3 in. |
| Collector Style | BALL and SOCKET Style (Gasketless) |
| Exhaust System Dia | 2-1/2 in. |
| Finish | Uncoated |
| Finish Type | Uncoated Mild steel |
| Flange Style | Standard |
| Replacement Head Flange Gasket | 27720 |
| Header Port Shape | Oval Port |
| Key Feature | Fenderwell Exit |
| Manual Transmission – Column | Yes |
| Manual Transmission – Floor | Yes |
| Material | Mild Steel |
| Port Shape | Oval |
| Power Steering | Yes |
| Reducer Outlet Size | 2-1/2 in. |
| Tube Diameter | 1-5/8 in. |
| Tube Length | Long Tubes |
| Tube Size | 1-5/8 in. |
| Variations | 89366, 89368 |
| Cylinder Head Port Shape | Oval |
| Header Finish | Uncoated |
| Header Material | Mild Steel |
| Mounting Hardware Included | Yes |
| Primary Tube Diameter (in) | 1.625 in. |
| Tuned | No |
| Weld-Up | No |
| Collector Bolts Included | Yes |
| Catalytic Converter(s) Included | No |
| Crossover Pipe Included | No |
| Motor Mounts Included | No |
| Quantity | Sold as a pair. |
| Cylinder Head | Stock Profile Heads |
| Replacement Gasket | 27720 |
| Installation Hardware Included | Yes |
| with A.I.R. System | No |
| with EGR | No |
| Y-Pipe Included | No |
| Collector Attachment | 3 in. |
| Header Construction | MILD STEEL- Standard-Duty |
| E.O. # | No |
| California Proposition 65 | WARNING: Cancer. For more info visit |
| Engine Version | Ford Modified Block (M) |
| Contents | headers, gaskets (when applicable), 3-bolt exhaust adapters, hardware |
| Title | HEDMAN HEDDERS FENDERWELL HEADERS FOR 1977-1979 4WD FORD BRONCO OR F1350, F250 OR F350 TRUCK; 351M OR 400M V8; 1-5/8 IN. LONG TUBE, 3 IN. BALL COLLECTOR- UNCOATED MILD STEEL |
| Emissions Notes | Not Legal For Street Use on ’75-Later Model Years! Legal for off-road use only. |
| Collector Diameter | 3 in. |
| Tube Style | Long Tubes |
| Package Contents | Headers, ball and socket reducers (exhaust adapters), gaskets, mounting hardware |
| Tube Material Thickness | 16g |
| Primary Tube Gauge | 16g |
| Flange Thickness | 0.3125 in. |
| Tube Design | Standard |
| Header Fasteners Included | Yes |
| Footnotes | 41. Fenderwell Exit |
| Header Style | Long Tube- Fenderwell Exit |
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