There must be inconsistencies in the filter media. For some people they work great..for others , they don't.
Do you want filters that have inconsistencies in the manufacturing? If it's inconsistent in one way it very well could be in another.
If so , run them. It's obvious you want to pinch pennies here. That's the ONLY reason someone would run them instead of genuine K&N's. There's no other benefit to them.
If it was just an isolated experience on my part, I'd say it was something I did or just a fluke. But I had 4 other people confirm that the same thing happened to them. The the shop I talked to confirmed they had 6-7 customers who had issues too. ..so take it as you will.
Sent from a van down by the river