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1977 GMC C35 Exhaust Header 8 Cyl 6.6L Hedman

4 on 28 ratings
  • Features:
    • 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)
    • Limited Lifetime Warranty On Construction, Five Year Warranty on Factory-Applied Header Coating!
    • Proud To Say, Made In The USA, Since 1954!

  • 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 as model for you in its Whittier, California manufactruring 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 1967-1987 2WD, 1/2 ton and 3/4 ton Chevy and GMC trucks, Suburbans, and Blazers 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 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 work with factory chassis, as well as, aftermarket front clips, like Porterbuilt.

    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.


Additional Fitment Information:
Vehicle Block CC Region Engine Engine Version CID
1977 GMC C35 V - United States 8 Cyl 6.6L Chevrolet 400
Brand Hedman
Part # H5669010
Condition New
Warehouse B
Hedman

C35 Hedman Exhaust Header 69010 1977 GMC
  • 67-87 C10/C20 SB CHEVY PICKUP (2WD); 1-5/8 in. MID-LENGTH TUBES- UNCOATED
  • Air Conditioning: Not for '67-69 with A/C! 1970 and later with Large Piston A/C need bracket 20110 Power Steering: Yes Auto Transmission - Column: Yes Auto Transmission - Floor: Yes Manual Transmission - Column: No Footnotes: (1) Without smog injection or injection heads. Footnotes: (121) Must modify rotary A/C bracket. Footnotes: (160) Early Model Chassis. ENGINE CENTERED in vehicle. Footnotes: (6) Modification to stock exhaust required to retain catalytic converter. Emissions Notes: RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
  • 67-87 C10/C20 Trucks and SUVs with SB Chevy; Standard Uncoated Hedders; 1-5/8" Tube Dia.; 3" Coll.; MID-LENGTH Design

    • General

    California Proposition 65
    Warning: Cancer. For More Info Visit Www.p65warnings.ca.gov
    Header Port Shape
    Oval Port
    Quantity
    Sold As A Pair.
    with A.I.R. System
    No
    Cylinder Head
    Fits Factory Gm Aluminum Angle Plug And Straight Plug Heads.
    Tuned
    No
    Cylinder Head Port Shape
    Oval
    Header Style
    Mid-length Tube
    Manual Transmission - Column
    No
    Flange Style
    Standard
    Collector Bolts Included
    Yes
    Bolts/Studs Included
    Yes
    Chassis Compatibility
    Not For Vehicles With Offset (right) Engine Position!
    Automatic Transmission - Floor
    Yes
    with EGR
    No
    Tube Material Thickness
    16g
    Tube Diameter
    1-5/8 In.
    Automatic Transmission - Column
    Yes
    Package Contents
    Headers, Ball And Socket Reducers (exhaust Adapters), Gaskets, Mounting Hardware
    Reducer Outlet Size
    2-1/2 In.
    Tube Size
    1-5/8 In.
    Port Shape
    Oval
    Tube Length
    Mid-length Tubes
    Manual Transmission - Floor
    Yes
    Collector Diameter
    3 In.
    Tube Style
    Mid-length
    Air Conditioning Notes
    70-up: Large Compressor Needs Bracket 20110; Small Compressor, Modify Oe Bracket
    Materials
    Mild Steel 16g Tubes; 5/16 In. Head Flanges; 1/4 In. Collector Flanges
    Variations
    69016
    Collector Size
    3 In.
    Header Finish
    Uncoated
    Mounting Hardware Included
    Yes
    Special Engine Notes
    Designed For Use With The Sb Chevy Engine Located In The Factory Position.
    Weld-Up
    No
    Collector Attachment
    3 In.
    Header Fasteners Included
    Yes
    Y-Pipe Included
    No
    Contents
    Headers, Gaskets (when Applicable), 3-bolt Exhaust Adapters, Hardware
    Finish Type
    Uncoated Mild Steel
    Motor Mounts Included
    No
    Primary Tube Diameter (in)
    1.625 In.
    Crossover Pipe Included
    No
    Header Construction
    Mild Steel- Standard-duty
    Replacement Head Flange Gasket
    27520
    Tube Design
    Standard
    Power Steering
    Yes
    E.O. #
    No
    Exhaust System Dia
    2-1/2 In.
    Flange Thickness
    0.375 In.
    Air Conditioning
    Yes
    Installation Hardware Included
    Yes
    Reducers Included
    Yes
    Primary Tube Gauge
    16g
    Header Material
    Mild Steel
    Title
    Hedman Hedders 67-87 C10/c20 Trucks And Suvs With Sb Chevy; Standard Uncoated Headers; 1-5/8 In. Tube Dia.; 3 In. Coll.; Mid-length Design
    Catalytic Converter(s) Included
    No
    Replacement Gasket
    27520
    Collector Style
    Ball And Socket Style (gasketless)
    Emissions Notes
    Not Legal For Street Use On '75-later Model Years! Legal For Off-road Use Only.
    Transmission Compatibility
    Manual Trans. Must Use Tailshaft Style Crossmember Or Modify Factory Crossmember

    Packaging

    bar code
    732611690102
    package quantity
    1
    length
    39.00 in
    width
    16.50 in
    height
    8.25 in
    weight
    24.00 lb
    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. 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.
    4. anthony wilson
      11 Dec, 2014
      Would have been 5 stars if the instalation on the passenger side was not so tight!
    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. Elias S
      07 Oct, 2014
      Great headers and super fast shipping!!
    8. 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.
    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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