Wrotte a review on 11-13-2006, since then I improved the little monster, added a TURBONATOR (cheap in cost) and H&K air filter, they increased the horsepower and the little monster flies the speedometer needle moves like the ones in the race car. The mpg changed from 30 to 37 mpg on a flat hwy, using cruise control that I had put in after writing my review in 2006. One thing to remember, keep the tires properly inflated. Had the SX4 since 2006 without any mechanical problems, runs like a true champ. Have gone thru some major storms and floods in AWD without any problems.
Increased power and better gas mileage, more relax during long trips by using cruise control.