Bored Out Throttle Body
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Joined: Aug 2011
Posts: 43,971
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I don't know. I go to 60mm on my Renix Jeeps because that's the size of the hole in the manifold. A stock HO throttle body is 58mm. I believe the hole in the manifold is 62 or 63mm. Go as big as the hole in the manifold. It isn't gonna hurt anything.
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