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Where Can I Get My Throttle Body Bored Out Is It A Worthy Upgrade

Posted in Internal Engine Parts | Asked on Jul 11, 2010

I have a lame 55mm throttle body on my 1990 Cherokee and want to bore it out a couple mm. I know a newer model intake fits but I have an EGR valve and it’s not an option untill I rebuild the engine (won’t be for a looong time). What are my options and where can I get this done?
New TB’s are not available for my year model, and I don’t want to buy one it’s too expensive.

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There are 2 Answers

  1. HotRodGuy says:

    Larger aftermarket TB’s are available for all of the 4.0′s if I remember correctly, but arren’t really going to improve performance without other mods to make use of the flow.

  2. LeAnne says:

    Boring out the throttle body will require a new butterfly plate as well – best if you just purchase a larger throttle body.

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