While it is difficult to determine the effectiveness of this product in terms of confirming an actual increase in performance contrary to what the manufacturer claims, this is my basis for the rating of this product depends on the condition in which it was received. When repackaged, it turned out that the rubber hose connecting the K&N filter to the housing had snapped. I had to use one of my own hose clamps to secure these two components as the clamp that came with it wasn't big enough. In hindsight it turns out that another customer trying to fit this rubber hose had to cut it off to fit it as it was also smaller. The metal bracket that secured the assembled kit to the front of the engine compartment was also deformed. Trying to install this product was an absolute nightmare.
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