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Need to replace stock exhaust manifold

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Tonyraca, Apr 12, 2005.

  1. Tonyraca

    Tonyraca Registered Member

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    I have a cracked stock exhaust manifold on my 1979 blazer. I am looking to replace it with hopefully an upgrade. I sent an email to Edelbrock, but they said they did not have anything that fit my application.
    I was thinking of just getting part #6863 K-5 Blazer full-size 83-86 5.0/5.7L w/carb & A.I.R. from Edelbrock. I believe that they say this doesn't fit because there is no emissions exemption for the 1979 year on this part. Does anyone have any suggestions? I will get new stock manifolds if I have to, but my real goal is to convert to dual exhaust with dual catalytic convertors.
     
  2. 1-ton

    1-ton 1/2 ton status Premium Member

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    Summit Racing has a set of smog legal set of shorty headers for your truck. They are a little pricey, but they are for your trucks application, and they are 50-state smog legal. There is no way you can have dual exhaust (even dual cats), and remain smog legal, but who cares about being smog legal if somehow you know a way to get away with it.
     
  3. dmanblazer

    dmanblazer 1/2 ton status

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    Forget manifolds because you'll never be able to keep them sealed thats one of GM's flaws. I have had this trouble with Oldsmobiles, Pontiacs and Chevrolets both cars and trucks. For example my 1 ton duelly has a BB in it and a midas exhaust system and they can't keep it from leaking if I hadn't payed so much for the exhaust system it would have headers on it by now and I'm using the hell out of the lifetime warantee with this problem,lol. But when I first got my '79 K5 it HAD manifolds on it guess what it has on it now, Afterburners!!!!!!!!!!!!!! You can still use cats.
     
  4. jwill

    jwill Registered Member

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    If your going to a dual exhaust then just get a set of headers. I went to a set of Flowtech headers for cheap. I then went to a set of Hookers. never going back. I sell replacement manifolds at work through my Balkamp supplier but likely are just as expensive for one side as a set of cheaper headers. No worry hear for emmisions.
    Well that was my two cents worth for the day.


    Jwill...Central Iowa
     
  5. captaininsano

    captaininsano 1/2 ton status

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    Headers are legal in CA if you have the air injection (if originally equipped) and a heat riser tube (kit easy to install).

    Get headers, cast manifolds suck!
     

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