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Headers or T.E.M.S

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by KILLERK5, Dec 26, 2001.

  1. KILLERK5

    KILLERK5 1/2 ton status

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    I am getting headers soon, and looking into it the only headers that I could find that came with the A.I.R. injectors, without drilling and welding (from the few that I looked at), was a tubular exhaust manifold. I dont know what th difference is exactly, but I would like to know if one is better tha the other. I've heard things about both, but nobody really knew the difference or if there was a big one. Anyway any input would be appreciated!

    Thanks



    88' K5 Silverado 9" Lift 38" Swamper TSL's<P ID="edit"><FONT class="small">Edited by KILLERK5 on 12/26/01 06:59 PM.</FONT></P>
     
  2. 79ChevySB

    79ChevySB 1/2 ton status

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    The tublar exhaust manifolds that you are talking about, are those for a 350? If so do you have a part number for those or a price?
     
  3. DesertDueler

    DesertDueler 1/2 ton status

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    Edelbrock headers or heir shorty headers are by far the best I have seen for fit or quality for eveything including the ones for a.i.r. They are pricey though.

    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>
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    Wild guess here, but he may be talking about the "Pontiac style" manifolds that GM made for some Chev 350's. They are shown in my parts guide for '85/'86, and basically they look like cast (real)shorty headers, with unequal length runners. Last I checked gmpartsdirect.com showed them as available, but they were upwards of $250 EACH, and I don't believe they showed AIR ports. No part number though, sorry, manual is now in storage. Dang I hate moving.

    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?
     
  5. txbartman

    txbartman 1/2 ton status

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    I did a lot of looking and you can get several brands of tubular or shorty headers with AIR. Edelbrock makes a very nice set. They are part #6863. You can get them through Summit for about $350. One thing about these, they come with their own y-pipe. If you have a lift, you will most likely be junking it. It will interfere with the front driveshaft.

    I spoke to Edelbrock directly regarding these. The y-pipe is part of what helps these things breathe. If you have to junk it, they recommend simply going with their nickel-plated shorty headers instead. These hook up to the factory y-pipe. Part #6527. Only problem, they aren't available until March or April 2002. And they will run between $305 and $350 as well.

    Flowtech makes an Afterburner full length header with AIR (Part #49100S, $240 thru Summit). I believe there are others out there as well.

    I was recently looking at all this same stuff. I believe that shorty headers (or block huggers) are a good choice if you want to retain all emissions, including AIR. I also believe full length headers will give better performance. If you are going with AIR, I would look at the Flowtech as they have AIR and are full length. Otherwise, go with the Edelbrock shorties out in the Spring. I am keeping all emissions on my truck when I do my 305/350 swap EXCEPT AIR. Most emissions places around here don't even know what it is, more/less how to check for it!



    Brian
    Check out <a target="_blank" href=http://tx85gmcguy.alloffroad.com>My Jimmy</a> with all her projects!
     

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