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Afterburner and Doug Thorley Headers

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by LA Bogger, Mar 2, 2001.

  1. LA Bogger

    LA Bogger 1/2 ton status

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    Location:
    Robins AFB, Georgia, USA
    I've been pricing headers and came up with two for about the same price. Afterburners with ceramic coating and Doug Thorley with the nickel plating that will probably wear of when you apply a little heat!!!!!!!!!! What everyone running out there? Are the Doug Header worth the money????

    Eat More Mud!!!!!!
     
  2. K10

    K10 Registered Member

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    I bought a set of Afterburner header and they had bends and dents all over in them. I sent them back and got a set of Hooker headers.
     
  3. 90K5

    90K5 1/2 ton status

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    Supposedly the Afterburners give a lot of low end torque because of the tri-y design, and more horsepower up higher. I will be going to them soon, I was considering the Thorleys, but the ones I saw were a lot more expensive. I'd like to have more power everywhere if possible, and those headers seem like they will work well for how I drive my truck.

    90K5

    See my truck at <A target="_blank" HREF=http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502>http://albums.photopoint.com/j/Albumindex?u=1329584&a=9886502</A>
     
  4. Whassup

    Whassup 1/2 ton status

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    I use Thorleys, I'm quite happy with their performance, and the plating on mine hasn't came off even slightly.

    "There's NO replacement for displacement!"
     
  5. IGOR

    IGOR 1/2 ton status Premium Member

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    I'm running Thorley's on my truck and love them! They did fade and lose their color, but you can jet-coat them if you want to prevent that - i definitely think they are worth the money - plus they have an awesome, awesome warranty
     
  6. Blazer79

    Blazer79 1/2 ton status

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    Guatemala, Central America
    I'm running Afterburners with ceramic coating. The coating is fine after more than a year. Installation was very easy and they made a perfect fit.

    Performance is great. I didn't lose any low-end torque as other headers, and gained a lot. When I open the hood, I don't feel a lot of heat since the ceramic coating keeps the heat inside.

    I also thought mine were bent when I bought them, but then I realized those bends were made on purpose to clear spark-plug installation.

    Bottom line is I'm very happy with them and feel they are great for the price I paid. Thorleys were much more expensive and were chromed, which is not as good as ceramic coating for this application.

    <font color=blue>//////
    <A target="_blank" HREF=http://blazer79.coloradok5.com>http://blazer79.coloradok5.com</A>
    </font color=blue>[​IMG]
     
  7. MudFrog

    MudFrog 1/2 ton status

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    I'm probably going with the afterburners pretty soon. I've heard nothing but good things about them. My dad seems convinced that you need to take the engine out to install them unless you want to work on it all day. How easy was the install?

    89 K5 Silverado
    <A target="_blank" HREF=http://mudfrog.coloradok5.com>http://mudfrog.coloradok5.com</A>
     
  8. jarheadk5

    jarheadk5 1/2 ton status

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    I've never heard a bad word said about Doug Thorley Tri-Y headers. A friend of a friend has an older RV with a 454; he installed the Thorley headers and picked up 2 MPG (BIG change for an RV) and lots more power on the butt-dyno. Thorleys are made with heavy-gauge tubing and massive flanges, which means they'll last longer than bargain headers. You get what you pay for... Which is why I'll be saving money for them.

    [​IMG] Semper Maintenance!
     
  9. 89 Blazzer

    89 Blazzer Registered Member

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    I put painted Afterburners on my 89. They slid in without much problem. I had to wiggle them around a little. If you have a lift they will go much easier because I think I had to take the starter off. The clearance gained underneath helped as far as plug installation and and the back passenger side bolts. I have not noticed a big power gain, but I have 160,000 on it and could use a fresh 350. I also went with copper gaskets and have not had a leak yet after 1 1/2 years. I haven't even re-tightened them yet. I did use some header paint from Eastwood. They looked great until the winter. I think the road salt did a number on the coating because the headers are only rusty on the bottom part that is exposed to the elements.
     
  10. bigerik

    bigerik 1/2 ton status

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    I just got some Thorley Tri-Y headers for $350 from www.summitracing.com. It was hard to cough up the cash, but I was replacing the Hedman headers which only lasted about 4 yrs[​IMG]. I don't recommend Hedman! The Thorleys came with a good gasket and quality construction. Initial performance is awesome, but it's only been 8 days. The triple plated chrome discolored a little, but I don't care about looks, just performance and durability. You can wipe them down with isopropyl alcohol (rubbing alcohol) if you want them to discolor uniformly.
     
  11. jarheadk5

    jarheadk5 1/2 ton status

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    When I get my Thorleys, I'm considering asking them if they can send them un-chromed so I can get them HPC or Jet-Hot coated. Not sure how that will go over, though...

    [​IMG] Semper Maintenance!
     
  12. blazen91

    blazen91 1/2 ton status

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    I can't speak for Thorleys on the Blazer, but I do have them on my Nissan. They where the best after-market product I have ever installed. The coating has faded with the heat, but no rust and they still look great. I would highly recamend the Thorleys.

    <A target="_blank" HREF=http://www.blazen91.coloradok5.com>http://www.blazen91.coloradok5.com</A>
    Protect the land FOR the people
    Not FROM the people
     
  13. Blazer79

    Blazer79 1/2 ton status

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    Installation was very easy. I didn't even had to remove the starter. I chose Afterburners because they came ceramic coated and still were cheaper than Thorleys. Low-end torque is great and I finally discovered what it feels to have a high-end torque.

    I highly recommend them.

    <font color=blue>//////
    <A target="_blank" HREF=http://blazer79.coloradok5.com>http://blazer79.coloradok5.com</A>
    </font color=blue>[​IMG]
     

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