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Old February 15th, 2008, 06:52
indy_xj indy_xj is offline
NAXJA Forum User
Join Date: Mar 2007
Location: indy
Posts: 28
Re: 0331 head swap, mpg change?

Thanks for the reply.

Originally Posted by 90PioSport99
I can tell you that's about what my 99 XJ gets mpg wise.
But according to your sig, you have a 3" lift and 31s. Mine is completely stock. I would hope for slightly better milage than something that is lifted.

Originally Posted by 90PioSport99
I forgot to ask...what did you do about the dual cats coming off your '00 exhaust manifold, did you hook them back up somehow or delete them?
Mine had federal emissions, not cali (only the '01 were ALL cali emissions) I have the standard 1pre-cat, 1post-cat O2 sensor and only the main exhaust cat.

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