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<p>Hedman Hedders has been manufacturing quality headers in the USA since 1954, and they've been manufacturing headers for Chevy trucks for nearly as long. 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 SB Chevy exhaust system to bolt up, even if it is not perfectly aligned with the header collectors.</p><p>This set is part of Hedman's ELITE® line of headers, which have stout 3/8 in. flanges, and thicker 14 gauge primary tubes. The heavy-duty construction of HEDMAN ELITE® Hedders makes them ideal for high-performance engines and tow vehicles, which produce higher exhaust temperatures.</p><p>ELITE® models have a MATTE-SILVER ceramic finish that can withstand temperatures up to 1400 degrees F. The coating looks great and increases exhaust speeds for improved exhaust scavenging, and reduced under hood temperatures.</p><p>These LONG-TUBE headers fit 1967-1991 2WD & 4WD Chevy/GMC 1/2 Ton and 3/4 ton trucks, Blazers and Suburbans <i>(check the application listings for exact fitment)</i> powered by a Small Block Chevy engine <i>(with A.I.R. System)</i>.. They are covered by CARB E.O. (Executive Order) #D167-33, making them 50-State Legal for the vehicles listed on the arb.ca.gov website. The smooth 1-5/8 in. tube design provides ample exhaust flow to let your truck's 283-400 SB Chevy engine breathe easy, and produce maximum horsepower and torque.</p><p>Each set includes a pair of gaskets, header flange bolts and collector bolts. No collector gasket is needed.</p><p>Hedman Hedders is so confident in the quality of its headers that these headers are factory backed by a Limited Lifetime Warranty. The ceramic-metallic finish is covered by a 5-year factory warranty, in addition to Hedman's standard lifetime header warranty.</p>
Hedman Hedders, began as a one man shop in 1954. Bob Hedman, founder of Hedman Hedders, sold his highly sought after exhaust tubes to fellow racers on the salt flats of the Mojave Desert. But, what started out as a way to make a few bucks to pay for Bob's racing hobby, quickly turned into the premier header manufacturer for both the racing and street header marketplaces.\n\nOriginally designed for straightline drag racers, word spread quickly about Hedman's reputation for building headers that gave you the best boost in power for your dollar. It wasn't long before Hedman Hedders was the brand of choice among racing's elite engine builders, racers and race series. Familiar names like Don Garlits, Warren Johnson, Shirley Muldowney, Bob Chandler and his BIG FOOT Race Team, and the IROC series.\n\nHedman Hedders constantly reshapes itself to meet environmental requirements and incorporates computer technology to ensure that its products offer the best performance improvement.\n\nWhether you're a Pro or sportsman racer, Hedman Hedders builds your headers with one goal in mind, optimum performance. Even if you're not a racer, the lessons Hedman learns at the track and on the dyno, make it into every street header we design.
This part fits the following vehicles.
| <i>COATED HEADERS DURING ENGINE BREAK-IN PERIOD</i> | <I><B><div style="background-color:red;color:white;padding:1%;">CLICK FOR IMPORTANT INFO REGARDING HEADER COATINGS DURING ENGINE BREAK-IN!</div></I></b> |
|---|---|
| Air Conditioning | Yes |
| Automatic Transmission - Column | Yes |
| Automatic Transmission - Floor | Yes |
| Bolts/Studs Included | Yes |
| 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 |
| Country Of Origin | US |
| Crossover Pipe Included | No |
| Cylinder Head | Fits Factory GM Aluminum Angle Plug and Straight Plug Heads. |
| Cylinder Head Port Shape | Oval |
| Drivetrain | 2WD |
| E.O. # | Yes |
| Emissions Notes | EO# D167-33 (click here for covered vehicles in document on ARB.CA.GOV website) |
| Exhaust System Dia | 2-1/2 in. |
| Finish | Matte Silver Ceramic-Metallic |
| Finish Type | MATTE SILVER Ceramic-metallic coated |
| Flange Style | Standard |
| Flange Thickness | 0.375 in. |
| Gasket Or Seal Included | Yes |
| Header Construction | MILD STEEL- ELITE Heavy-Duty |
| Header Fasteners Included | Yes |
| Header Finish | Matte Silver Ceramic-Metallic |
| Header Material | Mild Steel |
| Header Port Shape | Oval Port |
| Header Style | Long Tube |
| Installation Hardware Included | Yes |
| Installation Notes | May encounter clutch shaft interference. Use 69092, 69093 or 69892 |
| Key Feature | With A.I.R. |
| Manual Transmission - Column | No |
| Manual Transmission - Floor | Yes |
| Material | Mild Steel |
| Motor Mounts Included | No |
| Mounting Hardware Included | Yes |
| Notes | 82-91 GM Full Size Blazer, Jimmy 283-400 w/A.I.R. |
| 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 | 14g |
| Quantity | Sold as a pair. |
| Reducer Outlet Size | 2-1/2 in. |
| Reducers Included | Yes |
| Replacement Gasket | 27520 |
| Replacement Head Flange Gasket | 27520 |
| Street Legal | Yes |
| Tube Design | Standard |
| Tube Diameter | 1-5/8 in. |
| Tube Length | Long Tubes |
| Tube Material Thickness | 14g |
| Tube Size | 1-5/8 in. |
| Tube Style | Long Tubes |
| Tuned | No |
| Variations | 66091, 69891 |
| Weld-Up | No |
| With A.I.R. System | Yes |
| With EGR | No |
| Y-Pipe Included | No |
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)).
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