I have a Garrett T-3 with the .63 exhaust housing. I want to know if going to a .48 housing will give me less Turbo lag and maybe faster spool? And if going to that size housing will it be big enough for my power? Also, if I go to a smaller exhaust housing will I have to change the wheel/shaft? I've been told that all the exhaust wheels are the same. ???? Thanks!