I bought an Amazon CAI and it looks like a high school project compared to the new K&N FIPK. The Amazon unit came with poor photocopied instructions while the K&N unit has detailed instructions w/ pics. The Amazon CAI has to use RTV sealant. I guess it doesn't really matter if they both make the same power; but I don't want to install the Amazon unit if the K&N is better. I can sell it while it's new. Anybody have experience with both?