[Back in Black]

But I do remember reading that the problem with K & N and STOCK AIRBOXES (as in the test above) may be a matter of sealing at the rubber filter edges, in the stock box. This may be due to variations in airboxes (airbox changes for a new or older year than was used to design the filter?) which were not known or noticed by K & N, or it may be carelessness on their part... either way, use of a K & N with an oval type filter housing, it should be easy to verify leakage at the seal. The K & N element type is well proven to be generally superior in flow compared to restrictive paper elements. I have used them for many years on motorcycles, especially. So do a lot of professional racers