I just installed a new KN filter in my 14 Focus SE. I am not a dealer for the [email protected] division. I cannot believe that a simple exchange of air cleaning media would make that big of difference in performance. After 2500 miles the SE started to bog at the hit. The darn engine is so smooth and quiet that it's hard to make a 1'st gear launch. The KN filter is probably the cheapest HP one could find in the Ti-VCT. JMO.