The KO4 is great, it drives different then stock, stage 1 or 2. The power band kicks in a little later (3500rpm). You need to use your gears more and downshift as its a bigger turbo so it doesn't spool up as fast. BUT....it is a lot, lot faster, boarder line to fast. My next upgrade is brakes, you don't realize how fast you're going. But the around town drivability is awesome, for a daily driver the KO4 is great. It revs out fast and the power pulls all the way past redline. You'll like it!