I have a '12 express and have plans on getting a tuner in the future. Currently all I have done is a CAI and muffler with resonator delete done and I dont have any plans on doing anything else to the exhaust. Is it pointless to get the 180 tstat and efan installed if I do not have a tuner yet? I've been doing some searching and havent seen anything that answered this question. I understand that if I want a custom tune done that I should have these things done before I would get it custom tuned but I just wanted to know if I should wait to buy everything at once or if I can start chipping away at things first.