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Old 03-28-2012, 06:06 PM   #1
jj.91.yj's Avatar
Join Date: Mar 2011
Posts: 105
Motor help !

I Have a 89 YJ IL6 stock are there any up grades that I can do and still be smog legal in California I'm just looking for some more power under the hood or even a motor up grade any thoughts thank
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Old 03-28-2012, 10:38 PM   #2
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I think the only legal ones for CA are the howell or mopar fuel injection conversions

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Old 03-29-2012, 12:10 AM   #3
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Location: El Cajon
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Howell or Mopar TBI is basically the best way to get more power out of it, those kits provide somewhere around 20hp. Of course you can sneak on a 4.0 head and full MPFI system to gain somewhere around 50-60hp, but that's going to take a smog ref's approval...

2.5L Genius of some sort.
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