I picked up the K & N filters from an autoparts store. They were $60.00 each. They did not have them in stock, had to wait a few days for them to come in. Installation was easy, took no more than 10 minutes to install. I just filled my tank today, I will check my fuel log when I fill up again and see if there is any change. The engine does seem to "breathe" easier, a little more pep.