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Thread: Custom Upswept Headers

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  1. #1

    Custom Upswept Headers

    anyone have any pics of ls motors with upswept(thru the hood)headers??

    im thinking about going this route on my blazer,was wondering about
    building myself or what was avail.

    who would be my best bet to get flanges from to build my own??

    thanks
    build in progress:
    1970 k5 blazer,2004 5.3 fuel injected,sm465 manual 4speed,divorced 2.5 ton military transfer case,5 ton rockwell toploader axles,full hydro steering,23.1x26 r2's and 67x34x30hf4's

    build thread:
    http://67-72chevytrucks.com/vboard/s...d.php?t=221935

  2. #2
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    I bought my header flanges from www.crateenginedepot.com, they had the best price at the time and they are genuine GM flanges, almost 1/2" thick.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  3. #3
    Join Date
    Nov 2007
    Location
    Pittsburgh, PA
    Posts
    3,581
    bought my header flange from GM. went to dealer and they have them listed in the performance parts catelog. 7/16 they mic out to
    2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
    2002 Silverado - 427Lsx w/ Twin gt4202s
    2010 Silverado crewcab Z71 - 5.3litre w/ procharger
    2000 Wrangler - 5.3litre with some stance
    2014 Xsport- 3.5 Eco boost
    412 Motorsports

    it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference

  4. #4
    Join Date
    Mar 2009
    Location
    Cromwell, CT
    Posts
    256
    What if you got a pair of street rod ls1 block huggers and installed them upside down?
    01 ecsb 5.3 4x4 z71
    Avalanche 17s and a pant load of miles

    61 Corvette
    350, 4 speed, 4.56's

    32 Ford 4 door sedan
    keeping it "stockish"

  5. #5
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    that should get you want you want, or mount a set of Corvette manifolds upside down, there are a lot of guys with them sitting in a corner not being used.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  6. #6
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    yankee lake truck video looked like total chaos!
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  7. #7
    Join Date
    Jan 2009
    Location
    Round Rock, Texas
    Posts
    1,699
    They are called "zoomies"
    cjriojas:if you're weather man is a 5 gallon bucket, YOUUUUUUUUUUU might be a redneck
    danger_ranger83: I see now why it cost so much to get a harness made... FML
    2boostedSilverado: I like Casey's rear end, I want to chat with him about it

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