70 Z28 - Are these smog tubes any good

Discussion in 'Original Drivetrain Topic' started by COPO, Mar 9, 2010.

  1. 1981zapper

    1981zapper Veteran Member

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    Thats Crazy!!, Looks like there trying to be like California here,
     
  2. Z20AINT

    Z20AINT Veteran Member

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    That's why it's 1975 or older in the US for emissions exemption. I will never own a vehicle newer for my hobby toy.
     
  3. COPO

    COPO Veteran Member Lifetime Gold Member

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    Last edited: Mar 27, 2021
  4. DoTheDew

    DoTheDew Veteran Member

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    Ouch, that kinda stinks. I'd still look into the exemptions though, and they are out there, just find the fine print, print it off and keep it in your dash just in case. Kinda curious on a roadside checks, how would they know what proper equipment came on what car for every year, there must be a million different combinations. Do they have books to reference, or just go by the sticker on the rad support? I got off having to put cat's on my truck because it was over X weight limit, even though it actually wasn't (put some weight in the box when it was weighed). It would have also been exempt due to an engine change. I dunno, for all the trouble, I think its worth doing the legwork to get out of it. How many people have smog equipment on there but not working properly, or at all? It would really suck to go through all the resto, not have it work, get checked and then fined anyways.
     
  5. COPO

    COPO Veteran Member Lifetime Gold Member

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    Don't think they test to see if it works. Just that it's on. And I'm glad you asked how do they know what should be on the car. They have built a database and if you car is not on the list then they call GM Vintage Group in Oshawa and they send them the papers/diagrams to their PC in their car.:eek: Yes sir, they gotcha by the nuts.

    [​IMG]
     
    Last edited: Mar 31, 2010
  6. Eric winkel

    Eric winkel New Member

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    Just picked up a set of smog tubes that unfortunately were blasted, is painting them with Eastwood gray my only option? Could have at least masked off the check valves Screenshot_20210326-201349_eBay.jpg Screenshot_20210326-201732_eBay.jpg
     
  7. COPO

    COPO Veteran Member Lifetime Gold Member

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    Get some high heat engine paint which is available in various colours.
     
    Last edited: Mar 27, 2021
  8. Eric winkel

    Eric winkel New Member

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    Won't high heat engine paint just burn off the pipes or not as hot as the exhaust manifolds?
     
  9. 70lt1z28

    70lt1z28 Veteran Member Gold Member

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    This stuff:
    https://www.cerakote.com/shop/cerakote-coating/V-164/titanium

    will stick. Not cheap though. The C series are good to 1800F. If the tubes get that hot, you've got big problems. Go to the gallery to see the exhaust manifolds. There are gun shops that specialize in spraying it if you don't want to tackle it.
    Lots of colors too.
     
  10. Eric winkel

    Eric winkel New Member

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    Thanks for the info, time to remove the headers and start the install
     

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