Thanks for all the feedback. I have done some research and found some answers and corrected some things I was wrong on. To answer some questions:
I bought the car June of this year, it was installed earlier in June with 2,*** miles on the car. I have put under 2k miles on the K&N.
I don't know how it compares to the stock setup. I just installed the stock setup on Sunday as the car is going into storage for the winter. I love the look of the K&N, especially with the red valve covers, however the future plans will not require the K&N and with the car in storage for several months I figured now would be a good time to remove it. The install instructions have a dyno chart, 18/18 gain at the wheel.
The full kit and extra K&N parts came with the car. I paid him a bit extra for the K&N, Corsa and some other extras.
As far as the weight goes, the stock airbox is quite heavy, gotta be heavier than the K&N setup, at least that was my thought when installing the stock airbox. The K&N always got compliments on how awesome it looked.
I looked into what Tattooed mentioned. As with him, the cheapest I found the K&N for was about $425, most in the $450-$500.
(I just found out that the kit includes the 2 pre filters. This is where I was incorrect. I assumed those were extra as they sell for about $75 for the pair and every pic I have seen of this kit shows it without them. I am sorry for that mistake)
Based on the replies and me just finding out the kit includes the prefilters I think this is a fair price?
$375 shipped for the full kit with the 2 pre filters
$150 shipped for the extras
$510 shipped for the full kit with extras
