Comp that was mean but I was LMAO funny stuff there.
On a serious note if you bought the AFE Stage 2 Pro 5R it is not a stock replacement it is a tune required CAI so your airflow has changed and your car will need a tune. A CAI is not beneficial unless you are doing mods that enhance its potential. For instance a Roush CAI that does not require a tune is of no benefit other than the look when you open the hood, CAI's that require a tune will give you gains but much better used in conjunction with long tube headders and high flow cats or offroad setups. And there will be many opinions I was just passing on the basic information there are allot of combinations and options out there.