question

Hey guys, I am thinking about getting a de-cat exhaust (probably going with RaceFit), a K&N air filter and an ECU flash. My dealer told me that if I do these things I'll lose the warranty. I am searching online for warranty information for Kawasaki Motors EU but can't find any specifics. Q1...

Just bought an 05 ZX10 and is stock except for a yoshi TRS muffler. Other than the alarm system in the mail, I didn't want to do much more other than a new air filter if it was worth the money... Is a K&N filter worth the money or is there a better one? Would I even feel the horse difference...