i was buying some LT's and i was wondering which to get? the oens that have emmisions or not? i dont have to worry about that shat so what are the gains?

 

Probably no gains between the two... Id get rid of the egr and air system if iwere you. I ve seen this post 100 times so you should search next time but in short:

EGR can cause intake leak from heat, pumps soot in the intake, prevents some detonation

Air heats the cats up so they are at the right temperature quicker.