The area of to K&N or not to K&N is about as controversial as with the discussion of oils, etc. As I indicated in my last line, there are indeed some (limited, tho, from my experience) installations were the K&N works fairly well. However, even in those cases one cannot just look at spectrographic oil analysis alone as spectro analyzes particles of 5 microns and smaller. Anything larger than 5 microns can go undetected. So, even tho a spectro oil analysis may return a 10 silicon rating, there may be much larger particles entering the turbo/engine which can cause conserable damage long term. I have no association with any filter manufacturer; I do review several hundred oil analysis results a day and see at least 10 to 15 oiled gauze equipped vehicles a week reflecting elevated wear rates. When changed back to paper or other depth type medium, wear rates reduce. And yes, I have seen many a Duramax experience significant increases in reported wear rates when switching to an oiled gauze and then reduced back when reverting back to paper or depth type. Moreover, my only intent is to make people aware that there may be a price to pay for the K&N woosh, depending on the individuals goals are for his/her Duramax. Regarding the Baja. Yes, if one is only concerned about their engine lasting the length of the Baja, indeed, it keeps bricks and birds out very well. I have seen one too many sanded turbo vane/engine.. I am sharing my experiences only so one can make an educated choice.
George Morrison, STLE CLSEdited by: Georgecls