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1981 GMC K2500
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May Promo 1981 GMC K2500 Exhaust Header Hedman

1981 GMC K2500 Exhaust Header Hedman

★★★★☆ 4.7/5 28 ratings
Long-Tube Headers For 67-91 GM 283-400 Trucks & SUVs
  • Features:
  • Handcrafted, Mild Steel Construction.
  • Long Tube Header Design Provides Excellent Top-End Horsepower and Torque.
  • 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!
Air Conditioning: Yes
Power Steering: Yes
Auto Transmission - Column: Yes
Auto Transmission - Floor: Yes
Manual Transmission - Column: No
Manual Transmission - Floor: Some vehicles may encounter clutch shaft interference when cross shaft location is under or behind the driver side rear exhaust port. Use 69092 without A.I.R. Use 69093 with A.I.R. Order Elite 69892.
Footnotes: (1) Without smog injection or injection heads.
Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).
Footnotes: (121) Must modify rotary A/C bracket.
Footnotes: (160) Early chassis only.
Emissions Notes: RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Y-Pipe Included:No
with EGR:No
with A.I.R. System:No
Package Contents:Set of Headers, mounting hardware and gaskets
Installation Hardware Included:Yes
Replacement Gasket:27500
Cylinder Head:Fits Factory GM Aluminum or Cast Iron, Angle Plug and Straight Plug Heads.
Quantity:Sold as a pair.
Motor Mounts Included:No
Crossover Pipe Included:No
Catalytic Converter(s) Included:No
Collector Bolts Included:Yes
Catalog Code:HED
Weld-Up:No
Tuned:No
Primary Tube Gauge:16g
Primary Tube Diameter (in):1.625 in.
Mounting Hardware Included:Yes
Header Material:Mild Steel
Header Finish:Uncoated
Cylinder Head Port Shape:Round
Variations:69096, 69890
Tube Size:1-5/8 in.
Tube Material Thickness:16g
Tube Length:Long Tubes
Tube Diameter:1-5/8 in.
Tube Design:LONG TUBES
Reducer Outlet Size:2-1/2 in.
Power Steering:Yes
Port Shape:Round
Material:Mild Steel
Manual Transmission - Floor:No
Manual Transmission - Column:No
Header Port Shape:Round
Replacement Head Flange Gasket:27500
Flange Style:Standard
Finish Type:Uncoated Mild steel
Finish:Uncoated
Exhaust System Dia:2-1/2 in.
Transmission Compatibility:may encounter clutch interference if cross shaft behind driver side rear port
Collector Style:Ball and Socket Style (Gasketless)
Collector Size:3 in.
Automatic Transmission - Floor:Yes
Automatic Transmission - Column:Yes
Air Conditioning:Yes
Reducers Included:Yes
Header Style:Long Tube
Gasket Or Seal Included:Yes
Collector Attachment:3 in.
Flange Thickness:0.25 in.
Bolts/Studs Included:Yes
Header Construction:Standard-Duty
E.O. #:No
California Proposition 65:WARNING: Cancer. For more info visit www.P65Warnings.ca.gov
Contents:headers, gaskets (when applicable), 3-bolt exhaust adapters, hardware
Emissions Notes:NOT LEGAL FOR STREET USE ON '75-LATER MODEL YEARS! Legal for off-road use only.
Title:HEDMAN HEDDERS STANDARD UNCOATED HEADERS; 1-5/8 IN. TUBE DIA.; 3 IN. COLL.; FULL LENGTH DESIGN
Collector Diameter:3 in.
Notes :67-91 GM. Full Size Blazer, Jimmy 283-400 2-4WD
Chassis Compatibility:NOT For Vehicles With Offset (right) Engine Position!
Tube Style:Long Tubes
Standard-Duty Uncoated, Long-Tube Headers For 1967-87 CHEVY/GMC 2WD & 4WD, 1/2 to 1 Ton Pick-Up, SUV or Motorhome with 283-400 SB Chevy Engine (Centered Engine Chassis Only); 1-5/8 in. Long Tubes; 3 in. Ball/Socket Collector
22 In Stock
Best Price:
$348.30 USD $417.96 USD
BrandHedman
Part #H5669090
ConditionNew
WarehouseB
UPC732611690904
K2500 Hedman Exhaust Header 1981 GMC
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Additional Fitment Information:
Vehicle
1981 GMC K2500
Description Specifications Reviews (28)
  • Long-Tube Headers For 67-91 GM 283-400 Trucks & SUVs
  • Air Conditioning: Yes
    Power Steering: Yes
    Auto Transmission - Column: Yes
    Auto Transmission - Floor: Yes
    Manual Transmission - Column: No
    Manual Transmission - Floor: Some vehicles may encounter clutch shaft interference when cross shaft location is under or behind the driver side rear exhaust port. Use 69092 without A.I.R. Use 69093 with A.I.R. Order Elite 69892.
    Footnotes: (1) Without smog injection or injection heads.
    Footnotes: (103) Will fit with angle plug heads (Chevy aluminum only, L98).
    Footnotes: (121) Must modify rotary A/C bracket.
    Footnotes: (160) Early chassis only.
    Emissions Notes: RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
    Y-Pipe Included:No
    with EGR:No
    with A.I.R. System:No
    Package Contents:Set of Headers, mounting hardware and gaskets
    Installation Hardware Included:Yes
    Replacement Gasket:27500
    Cylinder Head:Fits Factory GM Aluminum or Cast Iron, Angle Plug and Straight Plug Heads.
    Quantity:Sold as a pair.
    Motor Mounts Included:No
    Crossover Pipe Included:No
    Catalytic Converter(s) Included:No
    Collector Bolts Included:Yes
    Catalog Code:HED
    Weld-Up:No
    Tuned:No
    Primary Tube Gauge:16g
    Primary Tube Diameter (in):1.625 in.
    Mounting Hardware Included:Yes
    Header Material:Mild Steel
    Header Finish:Uncoated
    Cylinder Head Port Shape:Round
    Variations:69096, 69890
    Tube Size:1-5/8 in.
    Tube Material Thickness:16g
    Tube Length:Long Tubes
    Tube Diameter:1-5/8 in.
    Tube Design:LONG TUBES
    Reducer Outlet Size:2-1/2 in.
    Power Steering:Yes
    Port Shape:Round
    Material:Mild Steel
    Manual Transmission - Floor:No
    Manual Transmission - Column:No
    Header Port Shape:Round
    Replacement Head Flange Gasket:27500
    Flange Style:Standard
    Finish Type:Uncoated Mild steel
    Finish:Uncoated
    Exhaust System Dia:2-1/2 in.
    Transmission Compatibility:may encounter clutch interference if cross shaft behind driver side rear port
    Collector Style:Ball and Socket Style (Gasketless)
    Collector Size:3 in.
    Automatic Transmission - Floor:Yes
    Automatic Transmission - Column:Yes
    Air Conditioning:Yes
    Reducers Included:Yes
    Header Style:Long Tube
    Gasket Or Seal Included:Yes
    Collector Attachment:3 in.
    Flange Thickness:0.25 in.
    Bolts/Studs Included:Yes
    Header Construction:Standard-Duty
    E.O. #:No
    California Proposition 65:WARNING: Cancer. For more info visit www.P65Warnings.ca.gov
    Contents:headers, gaskets (when applicable), 3-bolt exhaust adapters, hardware
    Emissions Notes:NOT LEGAL FOR STREET USE ON '75-LATER MODEL YEARS! Legal for off-road use only.
    Title:HEDMAN HEDDERS STANDARD UNCOATED HEADERS; 1-5/8 IN. TUBE DIA.; 3 IN. COLL.; FULL LENGTH DESIGN
    Collector Diameter:3 in.
    Notes :67-91 GM. Full Size Blazer, Jimmy 283-400 2-4WD
    Chassis Compatibility:NOT For Vehicles With Offset (right) Engine Position!
    Tube Style:Long Tubes
  • Standard-Duty Uncoated, Long-Tube Headers For 1967-87 CHEVY/GMC 2WD & 4WD, 1/2 to 1 Ton Pick-Up, SUV or Motorhome with 283-400 SB Chevy Engine (Centered Engine Chassis Only); 1-5/8 in. Long Tubes; 3 in. Ball/Socket Collector

General

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)
Crossover Pipe Included
No
Cylinder Head
  • Fits Factory Gm Aluminum Angle Plug And Straight Plug Heads.
  • Fits Factory Gm Aluminum Or Cast Iron, Angle Plug And Straight Plug Heads.
Cylinder Head Port Shape
Round
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
  • Uncoated Mild Steel! Shipped With Temporary Paint.
Flange Style
Standard
Flange Thickness
  • 0.25 In.
  • 0.3125 In.
Header Construction
  • Mild Steel- Standard-duty
  • Standard-duty
Header Fasteners Included
Yes
Header Finish
Uncoated
Header Material
Mild Steel
Header Port Shape
Round
Header Style
Long Tube
Manual Transmission Column
No
Manual Transmission Floor
No
Material
Mild Steel
Motor Mounts Included
No
Mounting Hardware Included
Yes
Notes
67-91 Gm. Full Size Blazer, Jimmy 283-400 2-4wd
Port Shape
Round
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
27500
Replacement Head Flange Gasket
27500
Transmission Compatibility
May Encounter Clutch Interference If Cross Shaft Behind Driver Side Rear Port
Tube Design
  • Long Tubes
  • Standard
Tube Diameter
1-5/8 In.
Tube Length
Long Tubes
Tube Material Thickness
16g
Tube Size
1-5/8 In.
Tube Style
Long Tubes
Tuned
No
Variations
69096, 69890
Weld Up
No
with A.I.R. System
No
with EGR
No
Y Pipe Included
No
Information on technical characteristics, the delivery set, the country of manufacture and the appearance of the goods is for reference only and is based on the latest information available at the time of publication.
  1. Bobby G.
    27 Mar, 2015
    Very nice and good price thanks
  2. SEAN B WAGERS
    12 Jan, 2015
    Fantastic finish and workmanship. Love the silver ceramic coating.
  3. anthony wilson
    11 Dec, 2014
    Would have been 5 stars if the instalation on the passenger side was not so tight!
  4. Christopher Davis
    11 Dec, 2014
    They bolted right on with no issues, a perfect match. Unfortunately with the Flowmaster muffler I already had I did not notice a difference in sound.
  5. Rafael Marcano
    24 Nov, 2014
    excelente
  6. Drop shopper
    24 Oct, 2014
    great sounding headers for my impala and good exhaust flow mid range
  7. AutoPartsWAY Customer
    07 Oct, 2014
    Great fit. Easy to install without lifting engine. High quality finish and strong welds. Also has great ground clearance. Only drops to about even with cross-member under oil pan. My 9" sump pan now hangs about an inch lower than the headers.
  8. Elias S
    07 Oct, 2014
    Great headers and super fast shipping!!
  9. Marci S.
    28 Aug, 2014
    The headers fit great and cleared the frame. The outlet is below the transmission crossmember, so plan on that when you look at your exhaust. The paint burns off quickly if you are going bare, but it makes A LOT of smoke. Otherwise, sand blast and coat before you install. Came with flange gaskets and reducers.
  10. Paal Selnaes
    19 Aug, 2014
    Do not start your engine in your garage after adding these!The black paint burns of and stinks like a nothing else!
  11. J. M. Carter "Jason Carter"
    12 Aug, 2014
    Great fit came on time and awesome look. I would recommend these for anyone in the market for a new set of headers.
  12. jscialabba
    16 Jul, 2014
    nice quality
  13. michael della
    12 Jul, 2014
    This are perfict for my low budget hot rod
  14. Jason Conaway "JMC"
    04 Jul, 2014
    These went on a 84 c10 305 stock. The only issue I ran across was that the header on the pass side was hitting the metal fuel lines. I called Hedman and they said they have never heard of this issue. I was able to bend the fuel lines just enough to keep them from touching the header. Then I wrapped the fuel lines with heat reflective tape. No problem after about a month of driving. If you have the money get the ones already coated. I had these sand blasted and painted them with VHT Fireproof black, using their Fireproof primer also. I baked the paint on the headers using the mounted on vehicle method as recommended by Hedman, So far so good as far as the paint staying on. Just a pain to paint. Truck sounds awesome with true duals 2 1/2" pipe with 40 series Flowmasters. No cats. No H pipe or X pipe. Off road vehicle only.
  15. Murch
    30 Apr, 2014
    Quick delivery, perfect fit not one issue would definitely recommend, Not a huge performance gain but that wasn't expected, very neat and tidy.
  16. Russ
    10 Jan, 2014
    item came as described but had a heck of a time installing them in my 70 nova sb with a/c. Had to cutevaporator box at bottom to clear headers. The collectors were new for me but seem to seal quite well.Next time will try hooker comps
  17. eagle275
    31 Dec, 2013
    I just ordered the wrong ones. I know several people who use these, get them powdered coated first or spray a very high temp coating/paint. Preparation is key to coating.
  18. larry french
    15 Oct, 2013
    I chose these partially due to pricing, but also the name. They look good, though I haven't completed the car as of yet to evaluate the overall performance factors.
  19. Ashley Ruiz
    09 Oct, 2013
    came quicker than i thought good quality even better that it came with the gaskets. love this product. i really recomend this product if you need good cheap headers
  20. juan a carreon
    18 Mar, 2013
    They look and sound perfect. Fit was perfect. I recommend them to anyone who is looking for great American products!!! Fast shipment too!!!
  21. Clout408
    07 Feb, 2013
    I snagged up these shorty headers after finding out that long tubes aren't CA legal. What an improvement in quality over the notoriously bad stock headers on my 2000's Mustang. No more exhaust leak whoo hoo!
  22. matt kaarlela
    03 Jan, 2013
    I'm happy with these overall. I did have some fitment issues so have to take off one star for that but with some coaxing, I finally got them all bolted up. I was happy I was able to buy american made product that didn't cost a fortune. Wish all my hotrod replacement parts were US made.
  23. JIM
    12 Dec, 2012
    Awesome!
  24. Richard K Braun
    11 Nov, 2012
    Very well constructed product. Will fit the AMC 304 currently in my CJ-7 as well as the AMC 401 that I am building to replace the 304 when it tires out. I like the under carriage exit leaving the vehicle to appear more stock. The the stubs that bolt to the lower plates of the manifolds are included in the set and will allow the manufacture and attachment of a custom exhaust system. These manifolds are sold as " uncoated " however, they are painted with a standard quality paint to prevent rust during shipping and storage. High temp would burn this coating off rapidly, so requires stripping prior to recoating with high temp paint or coating. The price is unbeatable, particularly when Free Shipping is taken into consideration....
  25. MCB
    06 May, 2012
    These are a great value, mine have lasted over 20 years and never had any failed welds or any problems. Gas mileage improved about 10 percent and torque is noticeably greater. Never any issues with rust or corrosion and they sound great.Despite what the ad (and some rooky southern California smog techs) say, these hedders are legal in California on 6200 gvwr and higher pickups manufactuered before 1979, which are all classified as federal heavy duty emmisions vehicles and came stock without cat, egr, evap etc etc.
  26. Adventure Junkie
    08 Apr, 2012
    CA SMOG LEGAL!!! nice product. Install is a PITA on both sides. The oil dipstick and tube will need to be removed and then modified to fit. or you can buy a flexable LOKAR setup. On the PASS side, be ready to ley over the engine and shoehorn these babies in. Getting them bolted to the mid pipe is a PITA also but overall a great product. It seals up well with the gasket provided. Just use a little high temp gasket maker on both sides to ensure a complete seal. The bolts go in easy and dont strip out like others. take your time and go easy, it will fit. They increase the sound and add som HP to the V6. Great when pair up with the DYNOMAX exhaust kit.
  27. Damon
    21 Jan, 2012
    The headers are not the chromed out version you see on the photo, but rather are the "Chikara" standards. However, they are good quality and you receive all the necessary equipment, bolts, O2 sensor rewire kit, individually packaged header gasket, collector gasket, and decals. If you have never done headers before than it comes with an instructional how to flyer and the steps one should take before and after attaching your equipment. Some of the black coat is coming off from being banged together during shipping, but overall I am extremely satisfied. My Talon now has better breathing and it really shows with this simple bolt on from Hedman!!
  28. J. Ellis "~Kitsune~"
    28 Oct, 2011
    Exactly what we were looking for, fixed the car right up and a few more days should be driving it! Thanks!

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