GM B-Body Forum, 77-79 Caprice/Impala Forum

Join Now If Your A 1977- 1979 Caprice or Impala owner or other GM B-Body owner!!!
Like us on Facebook https://www.facebook.com/BBodyForum?ref=hl

Join the forum, it's quick and easy

GM B-Body Forum, 77-79 Caprice/Impala Forum

Join Now If Your A 1977- 1979 Caprice or Impala owner or other GM B-Body owner!!!
Like us on Facebook https://www.facebook.com/BBodyForum?ref=hl

GM B-Body Forum, 77-79 Caprice/Impala Forum

Would you like to react to this message? Create an account in a few clicks or log in to continue.
GM B-Body Forum, 77-79 Caprice/Impala Forum

A forum for the owners and enthusiasts of General Motors B-Bodies from 1977-1990, but dedicated to the owners of 1977-1979 Impalas and Caprices. Join up now!


2 posters

    Headers 1990 9C1

    avatar
    impaloligist
    Newbie (Tier 1)
    Newbie (Tier 1)
    5th Year Anniversary
    Celebrating 5 years of being our member!


    Posts : 6
    Join date : 2016-07-08

    Headers 1990 9C1 Empty Headers 1990 9C1

    Post  impaloligist Mon Dec 31, 2018 11:27 am

    I am trying to find out which headers fit a 1990 Caprice 9C1.  But the issue I might have is I am looking for (1.75) 1-3/4 headers due to the fact I want to run a 400 plus inch small block engine.  I don't think that 1.625 (1-5/Cool or 1.5 (1-1/2) inch primary set will be able to flow enough to run the engine even to 5000 RPM.  Let alone 5800 or higher.  I don't care if it would be shortie, mid-length or long tube.  Then I'll worry about the rest of the exhaust later.  

    Does any set from an early Chevelle fit or older Impala?  I have heard the 73 to 75 Chevelle Big Block headers would fit a Big Block conversion but would the same year Small Block ones work?
    Kit1078
    Kit1078
    Freshman Member (Tier 3)
    Freshman Member (Tier 3)
    5th Year Anniversary
    Celebrating 5 years of being our member!


    Posts : 106
    Join date : 2015-04-26
    Location : Northeast Ohio

    Headers 1990 9C1 Empty Re: Headers 1990 9C1

    Post  Kit1078 Tue Jan 01, 2019 10:18 pm

    Most headers from second generation camaro fit, though I have found clearance to the passenger side frame rail can be really tight, and the frame to crossmember brace on the drivers side had to be removed on my car to clear the headers but I have the old style on my '79
    avatar
    impaloligist
    Newbie (Tier 1)
    Newbie (Tier 1)
    5th Year Anniversary
    Celebrating 5 years of being our member!


    Posts : 6
    Join date : 2016-07-08

    Headers 1990 9C1 Empty Redux

    Post  impaloligist Thu Jul 16, 2020 4:46 am

    Ok, so I decided to go with a big block.  Headers on order.  Will inform.

    Sponsored content


    Headers 1990 9C1 Empty Re: Headers 1990 9C1

    Post  Sponsored content


      Current date/time is Sun Jun 23, 2024 6:24 am