I visited a friend a few weeks back to see about getting a price on a case of oem air filters for my 2011 Silverado, I must have whined a little to much about not being able to find a Dryflow style replacement filter. My friend told me he'd hook me up and send a case of filters to the house and bill me later. One week later this showed up on my door step. A new K&N Blackhawk Dryflow air filter replacement system. Now all I have to do for payment is do a write up on performance, mpg gains, and install. Then get an after install Dyno tune completed in a few weeks.