Smooth power everywhere

[Red Mist_imp]

Setting aside the "technical" arguments for a moment, consider what drives the design and engineering decisions of an OEM vs. an aftermarket part manufacturer.

The OEM is highly motivated to avoid warranty claims. A single claim can and frequently does take all the profit out of a unit's sale. They aren't going to compromise on components that protect their profits.

An aftermarket part maker had a completely different mindset. For K 'n N I believe that means creating a reputation for higher performance and long (virtually unlimited) product life.

Yes. And a paper filter which is disposable is easy to maintain, just toss it and put in a new one. The K&N needs to be washed and re-oiled. Not difficult, but not as predictable as just installing a new filter. Over-oiling can really restrict the flow of air, and under-oiling can absolutely introduce too much dust.

Fortunately the K&N's come pre-oiled these days and will go 50,000 miles under normal conditions.