Its just a habit I have gotten into over the years with sports cars. I love the mid range of larger displacement engines. These cars pack a good mid range punch!
My gripe with K&N is the same when I had a 4th Gen Camaro. Both the GM and Nissan dealerships gripe about the MAS getting shorted out. I never know how much oil to put on it either. I rather say "Fix it" if anything goes wrong with a 100,000Mi Warranty. I don't see anything majorly wrong with the stock intakes design. I rather leave all the maintenance to the dealership and enjoy the car. It has more power than I need anyway
