You guys are young
I also used to try all these thing when I was around your age but always remember any thing out of stock Spec eventually put negative affect on your car, you may not notice in the beginning but in later stage you will realise.
Stock things kept the car healthy & out of spec thing make it sick & kill the ride slowly
Manufactures spent lot of time to set this spec by which your car gave max performance for max time.
Else choice is yours