Originally Posted by DSC_OFF
You could probably get the same improve in throttle response by just improving your filter more frequently lol.
I'm referring to the charcoal filter delete only lol. I clean the K&N Drop-In twice a year.
Definitely don't feel like it was a waste to me, and I'm a skeptic too.
and OP, I would check the connection on the back of your airbox. Your mpg's shouldn't have gone down.