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Headers

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by ONE2PLAY, Feb 12, 2002.

  1. ONE2PLAY

    ONE2PLAY Registered Member

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    I will be adding headers to my 89 blazer. I'm thinking about horleys. Does anybody agree or disagree with this choice?
     
  2. Thunder

    Thunder 3/4 ton status

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    The doug thorleys are a good header. I have always heard good things about them.
    I am running the Edelbrock TES on my 89. It is pretty similar to the Thorley system with the Y pipe. It has held up real well.
    I put it on 2 years ago and have had no leaks and it still looks almost new.

    <a target="_blank" href=http://coloradok5.com/gallery/Thunders-Blaze> Blazer pics</a>

    <font color=blue>Nevada... Where the pavement ends and the west begins
     
  3. marv_springer

    marv_springer 1/2 ton status

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    I say sell the horley and keep the Blazer!.... : D

    Marv
     
  4. kpanza

    kpanza 1/2 ton status

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    I have had the Thorleys for about 7 years now...still working great! I have had a couple of gasket leaks over the years, but generally they seal up real nice. Just make it a point to tighten the header bolts every time you change the oil (if they actually need tightening, otherwise just check them). They will last the life of your truck, won't rust apart like some others. They did add some torque also...they are kinda pricey, but when you figure that they will last a long time, you are actually getting a good deal.

    Keith

    So Cal Big Dawgs
    President
     
  5. ONE2PLAY

    ONE2PLAY Registered Member

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    Thank-You all.
     
  6. CaptCrunch

    CaptCrunch 1/2 ton status

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    The issue with Thorley has alwas been price. They aren't the cheapist, but they are dang good and coated. I'm trying to decide what way to go myself for headers when the new motor goes in. Thorleys, Flowtech afterburners (either coated or non) or Hookers (coated or not) . I think they are quality choices

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  7. slider

    slider 1/2 ton status

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    One last header you should look at is made by Stans Headers in Auburn Washington. Web site is www.stans-headers.com
    They use thick flanges on the head and a gasketless style coupler on the collector end. They look chrome plated but its not. They are the best headers I have ever used or seen. They are about the same price as Thorleys. Check them out, you will not be sorry. I love mine

    <P ID="edit"><FONT class="small">Edited by slider on 02/14/02 11:08 PM.</FONT></P>
     
  8. reddog64

    reddog64 1/2 ton status

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    Go Custom...

    My custom stainless steel headers on the 454 cost 665... have a 4 inch collector, and 2 inch pipe for each exhaust port... There purdy...
     
  9. grumpy

    grumpy 1/2 ton status

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    Put a dash betwen "stans" and "headers"
     
  10. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    If you don't mind doing a little grinding on the drivers side frame rail and redoing the front portion of your exhaust and installing the 02 sensor in the y pipe i would choose gibson stainless headers. I used these on my blazer and i love them. I had a 2 1/2 inch Y pipe made that goes into a 3 inch exhaust pipe and high flow cat and then gibson muffler and exits out the drivers side just rear of the tire. I did pick up a tremendous amount of torque and also some mileage. Just my $.02
     
  11. HarryH3

    HarryH3 1 ton status Author

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    Clicky: <a target="_blank" href=http://www.stans-headers.com>www.stans-headers.com</a> [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  12. dyeager535

    dyeager535 1 ton status Premium Member

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    How are they gasketless? They use the same type of flange as the stock manifold on the drivers side? (the cast in "donut" if you will) That would sure be a nice connection.

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  13. 84_Chevy_K10

    84_Chevy_K10 Banned

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    I have Dynomax coated. They're nice in the cheapo class. I'm sure the Thorleys would put them to shame, but for $200, they're great.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  14. CaptCrunch

    CaptCrunch 1/2 ton status

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    How has the coating stood up to the good ole rustbelt winter thus far Tim?

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
    <a target="_blank" href=http://coloradok5.com/gallery/captcrunch>http://coloradok5.com/gallery/captcrunch</a>
     
  15. chvyhs

    chvyhs 1/2 ton status

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    How much are the Thorleys?

    <a target="_blank" href=http://community.webshots.com/user/chvyhs>WebShot Pics</a>
    It's a wheelbase thing, you wouldn't understand.
     
  16. DesertDueler

    DesertDueler 1/2 ton status

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    Edelbrocks are a great headder. Those are the only ones we use on CHevy trucks at work. Never had a problem with them leaking, but the are expensive.

    86Jimmy 4"&35"MTRs,87 burb 4"&33"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     

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