I have been using this product for about 3 years and I am still very satisfied with it. No major problems were identified with the filtration system. All you need is a simple filter cleaning and you're done. It has a nice whistling sound that is clearly noticeable even with my loud exhaust system. Cons: The only issue is that the piece of plastic breather pipe they give you to attach to the air intake pipe broke in half on mine. Seems to be a common problem at K&N. I ended up having to assemble something from spare parts, but everything worked again. I believe the part number for this part is 08911. Overall this is a great air intake system and I would buy it again. hope that helps.
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