Almost anything that is purchased from Ducati will be priced considerably higher than if purchased from an outside source. Obviously, in many cases you'll have no choice but to purchase from Ducati if you need a specific genuine OEM part. But there are several items on the bike that can be purchased on the outside... oil filters, air filters, fasteners, clamps, spark plugs, lubricants, specialty tools, etc. If Ducati put their logo on an oil filter manufactured by K&N, it would likely sell for the same price or more than the filter they currently supply. Look at the spark plugs... you can buy the identical spark plug at a fraction of the cost if purchased from an outside source. I've been running with the K&N oil filter for years without any problems.