I have been using HD filters since my bike was new but now the dealer has raised the price of the black to $13.95!!! That is just nut's. I refuse to pay that much for a filter. I sent WIX an email about the 51348 and they replied saying that when they tested the HD filter campared to theres that they were the same. The WIX is $6.49 at the auto parts store so that is what I will be using from now on. BTW, the dealer has allso raised the price of there HD360 (witch I dont use) to $7.95 a qt. Needless to say, I wont be going to the dealer any time soon.