I have a 2014 Maibu LTZ with the 2.5 engine. Being LTZ it has factory dual exhaust, and I installed a K&N Typhoon cold air intake on it. Before the Trifecta tune I was pretty happy with the car, it was a family sedan with teeth, after it feels like a sports car in a sedan body. The soft shifting has changed to snaps. The shift points are very agressive in moderate acceleration, if floored the shfit points are long and mean. It is fantastic! Better than I expected. It feels like a different car. A friend of mine traded his Corvette in for a Jaguar F-type R and he was amazed with my Malibu. He actually thinks the shifting on my malibu is nicer than his $100K F-type. Obviously I don't come even close to him in just about everything else, but this friend was VERY impressed with what the Trifecta did to my "family car".