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Unread 02-26-2002, 10:36 PM   #1
tufmar
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1998 ZJ 
 
Join Date: Feb 2002
Location: MD
Posts: 390
4.0 high output

Hey guys, i was wondering if there is a difference between the 4.0 high output vs. the regular 4.0 in yj's, thanks

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Unread 02-27-2002, 02:48 PM   #2
91XJLimited
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The difference in the HO and the regular 4.0 is that there is a larger air intake tube, a bigger cam, and larger (bore) throttle body. I know those for sure, and they may be possibly more.
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Unread 03-03-2002, 03:02 PM   #3
hamyscj
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The heads are ported differently for better flow also. Hamy.
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