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Old May 13th, 2010, 05:54 AM   #13
Recovering XJ owner
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Join Date: 11-05-05
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I have the hypertech programmer for my '99 and I'd say the "power" increase is about as noticable as installing an air intake system. (if that makes sense)

The main thing for the programmer was to program the tire size to get the speedo and shift points back in range, which works great.
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