What should I do? K&N CAI vs. Stock Box & Others

[Grandpa]

Logic and reason are great in a discussion when you have all the facts and expierence otherwise its just conjecture based on ignorance. You need seat time D and first hand expierence with your car. No two cars alike. You can have the same exact mods, tune and same driver making passes and get different results more times than not because they are two different cars regardless if they are the same make/model.