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Re: After market mods
All CAI's that I have seen have been DIY.
I have installed a custom exhaust on mine and it made about 1mpg difference in mileage. Seems to make some HP difference, maybe 5-7hp. The most difference I noticed is at about 1/2 throttle the transmission acted like the engine was putting out more power than it was expecting and the shifts were odd for about three days. After a time the trans controller must have re-callibrated for the higher engine output and the shifts smoothed out again. Something else though, it raised the WOT shift point (3.8l) from 4600rpm to 4900rpm. Not much of a change but evidently the engine is putting out more power above it's factory 4400rpm HP peak. The trans controller has a very complicated AI program and makes adjustment based on power output and driving style.
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