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Lifted trucks and Headers

Discussion in 'The Garage' started by 88-383, Nov 16, 2005.

  1. 88-383

    88-383 1/2 ton status

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    Here's a question for those in the know!

    Currently my truck isn't lifted but I plan on doing a 4" lift very very soon. I'm thinking of going with the Dough Thorley tri-y's.

    My question is would a 4" suspension lift change anything? or am I missing something here. I mean, if you put a 4" kit on K5 do you have to change the y-pipe? or would this only apply to a body lift?

    Thanks

    KM
     
  2. 88-383

    88-383 1/2 ton status

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    The reason I'm asking is because Summit has the headers for lifted and non lifted trucks. I only want to buy one set of headers.

    KM
     
  3. muddybuddy

    muddybuddy 3/4 ton status

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    hmm im not sure, the only place it would hit would be the shackle?? im not really sure. i didnt know there were different headers for lifted and non lifted.
     
  4. 77crewcab

    77crewcab 1/2 ton status

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    Just thinking out loud here but when you do a suspension lift the lift is in the suspension and the engine, trans etc doesn't move. On body lifts the body is spaced off the frame more and no engine movement. I don't see how a lift of any sort would affect the headers unless there is some sort of interference with the lift bracketry.
     
  5. muddybuddy

    muddybuddy 3/4 ton status

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    those were my thoughts to. i know that some people on here complain about fitment with various brands, but i dont think a lift would make it worse...but whta do i know, i still got the stockers on for now
     
  6. 88-383

    88-383 1/2 ton status

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    I had the same thoughts as well, then I called tech-support for Dough Thorley headers. The guy there told me that the y-pipe is the main difference. Could it be that that full length headers have to clear something? axle perhaps?

    Here's a Link to their website. About 1/2 way down check out the 73-91 Blazers/Jimmy etc... I was kinda surprised there was a difference myself.

    Does anyone else make a kit with full length headers and a y-pipe that will bolt up and slip onto the stock cat/location? I'm thinking of going with this kit,high flow cat and the flowmaster cat back. But I'm open to ideas!

    KM
     
  7. muddybuddy

    muddybuddy 3/4 ton status

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    maybe the headers are angled down more for the lifted ones so that the y-pipe doesnt hit the front driveshaft. but with 4" of lift that should be a concern
     
  8. Janitorjim8

    Janitorjim8 1/2 ton status

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    i had headers on before doing my lift, and after, no problems, but i also run straight pipes with no y or H pipe, so it may be for that clearance.
     
  9. ryoken

    ryoken Puppy Fabricator Premium Member GMOTM Winner

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    from my understanding, it is just the y-pipe that is different... headers are the same.. its a driveshaft clearance issue..
     
  10. ShitownK5er

    ShitownK5er 1/2 ton status

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    since the y-pipe goes under the front driveshaft when you lift it there could be some clearence problems
     

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