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throttle body swap 2.5 to 4.0

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  • throttle body swap 2.5 to 4.0

    does any body know about upgrading a stock 2.5 throttle body to a 4.0? i have a 89 and can only find info on 91 and newer

  • #2
    I have heard it does.
    -Caleb

    Crawl Daddy Champion 2011

    1999 XJ 4 inchs of lift or so, 35s and some other stuff.

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    • #3
      i know on newer ones it makes a big difference but cant find any info on mine or what to use... its completly different... has anyone done one on an older one or know what to use?

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