I have the Ford performance tune. After installing the intercooler the car does not pull as hard. It's not as responsive. In second gear around 2,000 rpms it would pull instant and squeal tire throughout the RPMs now it feels more sluggish and does not squeal tire at all. It feels more like the stock intercooler on a hot day. It is 70 out. I would rather have the stock intercooler and the car feel like this on hot days but on cooler days I get more power than the aftermarket intercooler feeling like this all the time.