Hedman Hedders has been manufacturing quality headers in the USA since 1954, and they've been manufacturing Chevy S10, GMC S15, V8 engine swap specific headers for over 20 years. 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 Small Block Chevy exhaust system to bolt up, even if it is not perfectly aligned with the header collectors.
These HTC Coated, MID-LENGTH TUBE headers are designed specifically for installing a Small Block Chevy 283-400 (Gen 1) engine into 1982-2004 Chevy S10/Blazer, GMC S15/Jimmy 2WD trucks. Fits both manual and automatic transmission trucks. The smooth 1-1/2 in. tube design provides ample exhaust flow to let your transplanted 283-400 SB Chevy engine breathe easy, and produce additional horsepower and torque over factory manifolds.
To ensure a proper installation, it is recommended that these headers be installed with Trans-Dapt Performance Product's #9906 engine swap mount kit.
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. These headers have a high temperature, POLISHED-SILVER ceramic finish that resists corrosion, and can withstand temperatures up to 1400 degree F. This finish is covered by a 5 year factory warranty, in addition to Hedman's standard lifetime header warranty.
- Handcrafted, Mild Steel Construction.
- 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.
- Ball & Socket Collector Design requires No Gasket, and Allows For More Exhaust System Misalignment than Old School, Gasket-Style Header Collectors
- Includes All The Necessary Mounting Hardware, Gaskets and Reducers (exhaust adapters)
- Limted Lifetime Warranty On Construction, Five Year Warranty on Factory-Applied Header Coating!
- Proud To Say, Made In The USA, Since 1954!
Application Summary:
| Year | Make/Model |
|---|---|
| 1982-1984 | GMC Jimmy |
| Attributes | |
| Air Conditioning | Yes, Yes, Yes |
| Application | Automotive |
| ASIN | B000CEM4X0 |
| Automatic Transmission - Column | No, No, No |
| Automatic Transmission - Floor | Yes, Yes, Yes |
| Bolts/Studs Included | Yes, Yes, Yes |
| California Proposition 65 | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| Catalytic Converter(s) Included | No, No, No |
| Coating/Finish | Metallic Ceramic |
| Collector Attachment | 2-1/2", 2-1/2 in., 2-1/2 in. |
| Collector Bolts Included | Yes, Yes, Yes |
| Collector Diameter | 2-1/2 in., 2-1/2 in. |
| Collector Size | 2-1/2", 2-1/2 in., 2-1/2 in. |
| Collector Style | Ball and Socket Style (Gasketless), BALL and SOCKET Style (Gasketless), BALL and SOCKET Style (Gasketless) |
| Collector Tube Size (in.) | 2.5 |
| Contents | headers, gaskets (when applicable), 3-bolt exhaust adapters, hardware, headers, gaskets (when applicable), 3-bolt exhaust adapters, hardware, One pair of headers, head flange gaskets, collector flange gaskets (when applicable), 3-bolt exhaust adapters, mounting hardware |
| Country of Origin (Primary) | US |
| Crossover Pipe Included | NO, No, No |
| Cylinder Head | Stock Profile Heads, Stock Profile Heads, Stock Profile Heads |
| Cylinder Head Port Shape | Round, Round, Round |
| Drivetrain | 2WD Only!, 2WD Only!, 2WD Only! |
| E.O. # | No, No |
| Emission Code | Not in CA |
| Emissions Notes | NOT LEGAL FOR STREET USE ON '75-LATER MODEL YEARS! Legal for off-road use only., NOT LEGAL FOR STREET USE ON '75-LATER MODEL YEARS! Legal for off-road use only., Not Legal For Street Use on '75-Later Model Years! Legal for off-road use only. |
| Engine | Chevy SB 283-400 (Gen 1) 1958-86, Chevy SB 283-400 (Gen 1) 1958-86 |
| Engine Make/Size | Chevy Small Block (262-400) |
| Exhaust System Dia | 2-1/2", 2-1/2 in., 2-1/2 in. |
| Finish | HTC Polished Silver Ceramic-Metallic, HTC Polished Silver Ceramic-Metallic |
| Finish Type | HTC SILVER (polished) Ceramic-metallic Coating, HTC SILVER (polished) Ceramic-metallic Coating, HTC SILVER (polished) Ceramic-metallic Coating |
| Flange Style | Standard, Standard, Standard |
| Flange Thickness | 0.25", 0.3125 in., 0.3125 in. |
| Gasket # | 27500 |
| Gasket Or Seal Included | Yes, Yes, Yes |
| Harmonized Tariff Code (Schedule B) | 8708925000 |
| Hazardous Material Code | N |
| Head Flange Gasket | 27500 |
| Head Type | Factory Heads, Factory Heads |
| Header Construction | Standard-Duty, MILD STEEL- Standard-Duty |
| Header Fasteners Included | Yes, Yes |
| Header Finish | HTC Polished Silver Ceramic-Metallic, HTC Polished Silver Ceramic-Metallic, HTC Polished Silver Ceramic-Metallic |
| Header Material | Mild Steel, Mild Steel, Mild Steel |
| Header Port Shape | Round, Round, Round |
| Header Style | Mid-Length Tube, Mid-Length Tube |
| Installation Hardware Included | Yes, Yes, Yes |
| Key Feature | 2WD Only., 2WD Only., 2WD Only. |
| Life Cycle Status Code | Available to Order |
| Manual Transmission - Column | No, No, No |
| Manual Transmission - Floor | Yes, Yes, Yes |
| Material | Steel, Mild Steel, Mild Steel |
| Motor Mounts (Included) | NO, No |
| Motor Mounts Included | NO, No, No |
| Mounting Hardware Included | Yes, Yes, Yes |
| NAFTA Preference Criterion Code | B |
| Notes | 82-00 GM S10/15, Blazer, Jimmy, Sonoma 2WD SBC, 82-00 GM S10/15, Blazer, Jimmy, Sonoma 2WD SBC, 82-00 GM S10/15, Blazer, Jimmy, Sonoma 2WD SBC |
| Package Contents | One pair of headers, head flange gaskets, collector flange gaskets (when applicable), 3-bolt exhaust adapters, mounting hardware, Headers, ball and socket reducers (exhaust adapters), gaskets, mounting hardware, Headers, ball and socket reducers (exhaust adapters), gaskets, mounting hardware |
| Port Shape | Round, Round, Round |
| Power Steering | Yes, Yes, Yes |
| Primary Tube Diameter (in) | 1.50", 1.50 in., 1.50 in. |
| Primary Tube Gauge | 18g, 16g, 16g |
| Quantity | Sold as a pair., Sold as a pair., Sold as a pair. |
| Reducer Outlet Size | 2-1/2", 2-1/2 in., 2-1/2 in. |
| Reducers Included | Yes, Yes, Yes |
| Replacement Gasket | 27500, 27500, 27500 |
| Replacement Head Flange Gasket | 27500, 27500 |
| SDR Required Flag | N |
| Transmission Mount Included | NO |
| Transmission Mount/Crossmember (Included) | No, No |
| Transmission Mount/Crossmember Included | No |
| Tube Design | MID-LENGTH, Standard |
| Tube Diameter | 1-1/2 in., 1-1/2" |
| Tube Direction | Down Swept |
| Tube Length | MID-LENGTH Tubes, Mid-Length Tubes |
| Tube Material Thickness | 18g, 16g, 16g |
| Tube Size | 1.5, 1-1/2", 1-1/2 in., 1-1/2 in. |
| Tube Style | Mid-Length, Mid-Length |
| Tuned | NO, No, No |
| Variations | 69520, 69528, 69520, 69528, 69520, 69528 |
| Weld-Up | No, No, No |
| with A.I.R. | No |
| with A.I.R. System | No, No, No |
| with EGR | No, No, No |
| Y-Pipe Included | No, No, No |
| GTIN | 00732611695268 |