Originally Posted By: Whimsey
Most likely K&N is supplying the specs they want the filters to meet. Are the specs the same as the Champion made filters, time will tell. Will the Korean made filters save us the consumer any money versus the US Champion made filter, unlikely.
I think Jay Buckley summed it up pretty well here:
Originally Posted By: Motorking
The filter efficiency has been reduced from the mid 90's% range down to mid 80 percent range in our testing. They no have lower efficiency, lower capacity and a lower cost that they are not passing along to end users.
This is from his post in the thread linked by sayjac above.