November 14, 2010
I have a K&N intake and SLP exhaust also and with a 3.8l engine and a car that's not small, I can get about 35-38 mpg hwy and 30 mpg city all day long. The performance gain was noticeable, and I like that I can change the shift points and rev limiter (and top speed governor). I was hoping for a bigger change in the transmission shift firmness, I set it to max firmness and it is better than stock but I like a firmer shift that I suppose only a shift kit will provide.
As for quality the buttons and wire adaptor are kinda iffy, but once its set up and programmed into the car it doesn't matter. It's not like a cell phone, it only gets used about 5 times at first to tune the car in perfect and then sits in a box. If your area has emissions testing my car was almost clean enough to breath off the tailpipe with the performance tuning installed.