Hedman Hedders has been manufacturing quality headers in the USA since 1954, and they've been manufacturing Chevy truck headers for nearly as long. Whether your cherished truck is powered by a Chevy small block, big block, or LS engine, Hedman Hedders manufactures a header model for you in its Whittier, California manufacturing facility. This 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 Small Block Chevy exhaust system to bolt up, even if it is not perfectly aligned with the header collectors.
These uncoated, MID-LENGTH tube headers fit 1967-74 4WD Blazers, 1/2 ton and 3/4 ton Chevy and GMC trucks, Suburbans with a SB Chevy engine (check the application listings for exact fitment). The smooth 1-5/8 in tube design provides ample exhaust flow to let your Blazer or C10/C20, C15/C25 truck's 283-400 SB Chevy engine breathe easy, and produce maximum horsepower and torque. The MID-LENGTH design of these headers keeps the header connection up, tighter to the body, so you can keep your entire exhaust above the frame rails.
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:
| Description_DEF |
Exhaust Header |
| Description_DES |
67-74 BLAZER, PICKUP/SUV (4WD) 283-400; 1-5/8 in. MID-LENGTH-MILD STEEL UNCOATED |
| Description_FAB |
Designed Specifically For 4WD Chevy Blazers and Trucks. |
| Description_FAB |
Handcrafted, Mild Steel Construction. |
| Description_FAB |
The Mid-Length Tube Header Design Provides Significantly More Low and Mid-range Power than Cast Manifolds, and Provide Better Ground Clearance And Component Compatibility Than Long Tube Headers. |
| Description_FAB |
Ball & Socket Collector Design requires No Gasket, and Allows For More Exhaust System Misalignment than Old School, Gasket-Style Header Collectors. |
| Description_FAB |
Includes All The Necessary Mounting Hardware, Gaskets and Reducers (exhaust adapters). |
| Description_FAB |
Proud To Say, Made In The USA, Since 1954! |
| Description_EXT |
67-74 BLAZER, PICKUP/SUV (4WD) with 283-400 SB Chevy Engine; 1-5/8 in. Diameter MID-LENGTH Tubes, 3 in. Ball/Socket Collector- UNCOATED MILD STEEL |
| Description_SHO |
HEADERS, UNCOATED |
| Description_MKT |
Hedman Hedders has been manufacturing quality headers in the USA since 1954, and they've been manufacturing Chevy truck headers for nearly as long. Whether your cherished truck is powered by a Chevy small block, big block, or LS engine, Hedman Hedders manufactures a header model for you in its Whittier, California manufacturing facility. This 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 Small Block Chevy exhaust system to bolt up, even if it is not perfectly aligned with the header collectors.
These uncoated, MID-LENGTH tube headers fit 1967-74 4WD Blazers, 1/2 ton and 3/4 ton Chevy and GMC trucks, Suburbans with a SB Chevy engine (check the application listings for exact fitment). The smooth 1-5/8 in tube design provides ample exhaust flow to let your Blazer or C10/C20, C15/C25 truck's 283-400 SB Chevy engine breathe easy, and produce maximum horsepower and torque. The MID-LENGTH design of these headers keeps the header connection up, tighter to the body, so you can keep your entire exhaust above the frame rails.
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.
|
| Description_INV |
HEDMAN GM 4WD TRUCK HEADERS-UNCOATED |
| Air Conditioning |
Yes |
| Air Conditioning Notes |
70-Up: LARGE compressor needs bracket 20110; SMALL compressor, modify OE bracket |
| Automatic Transmission - Column |
Yes |
| Automatic Transmission - Floor |
Yes |
| Bolts/Studs Included |
Yes |
| California Proposition 65 |
WARNING: Cancer. For more info visit www.P65Warnings.ca.gov |
| Catalytic Converter(s) Included |
No |
| Chassis Compatibility |
NOT For Vehicles With Offset (right) Engine Position! |
| Collector Attachment |
3 in. |
| Collector Bolts Included |
Yes |
| Collector Diameter |
3 in. |
| Collector Size |
3 in. |
| Collector Style |
BALL and SOCKET Style (Gasketless) |
| Contents |
headers, gaskets (when applicable), 3-bolt exhaust adapters, hardware |
| Crossover Pipe Included |
No |
| Cylinder Head |
Fits Factory GM Aluminum Angle Plug and Straight Plug Heads. |
| Cylinder Head Port Shape |
Oval |
| E.O. # |
No |
| Emissions Notes |
Not Legal For Street Use on '75-Later Model Years! Legal for off-road use only. |
| Exhaust System Dia |
2-1/2 in. |
| Finish |
Uncoated |
| Finish Type |
Uncoated Mild steel |
| Flange Style |
Standard |
| Flange Thickness |
0.3125 in. |
| Gasket Or Seal Included |
Yes |
| Header Construction |
MILD STEEL- Standard-Duty |
| Header Finish |
Uncoated |
| Header Material |
Mild Steel |
| Header Port Shape |
Oval Port |
| Header Style |
Mid-Length Tube |
| Installation Hardware Included |
Yes |
| Manual Transmission - Column |
No |
| Manual Transmission - Floor |
Yes |
| Material |
Mild Steel |
| Materials |
Mild Steel 16g Tubes; 5/16 in. Head Flanges; 1/4 in. Collector Flanges |
| Motor Mounts Included |
No |
| Mounting Hardware Included |
Yes |
| Package Contents |
Headers, ball and socket reducers (exhaust adapters), gaskets, mounting hardware |
| Port Shape |
Oval |
| Power Steering |
Yes |
| Primary Tube Diameter (in) |
1.625 in. |
| Primary Tube Gauge |
16g |
| Quantity |
Sold as a pair. |
| Reducer Outlet Size |
2-1/2 in. |
| Reducers Included |
Yes |
| Replacement Gasket |
27520 |
| Replacement Head Flange Gasket |
27520 |
| Special Engine Notes |
Designed for use with the SB Chevy engine located in the factory position. |
| Title |
HEDMAN HEDDERS 1967-74 CHEVY/GMC 4WD PICKUP, SUBURBAN, K5 BLAZER/JIMMY WITH SB CHEVY; STANDARD-DUTY MILD STEEL, 1-5/8 IN. TUBE DIAMETER, MID-LENGTH DESIGN HEADERS, UNCOATED; 3 IN. BALL/SOCKET COLLECTOR |
| Transmission Compatibility |
Manual Trans. must Use TailShaft style crossmember or modify factory crossmember |
| Tube Design |
Standard |
| Tube Diameter |
1-5/8 in. |
| Tube Length |
Mid-Length Tubes |
| Tube Material Thickness |
16g |
| Tube Size |
1-5/8 in. |
| Tube Style |
Mid-Length |
| Tuned |
No |
| Weld-Up |
No |
| with A.I.R. System |
No |
| with EGR |
No |
| Y-Pipe Included |
No |
| Length |
9.0000 |
| Width |
17.0000 |
| Height |
30.0000 |
| Weight |
24.0000 |
