ok i am in the process of ordering a smarty sr, afe 4" turbo back exhaust and arp head studs. my question is, which needs to be installed first, second and last? does it matter what order i do these? not sure but im thinking i have to install tuner than the exhaust and head studs. this sound right to you guys? appreciate any help in advance. BTW right now my 2011 is complete stock with 50000 miles on it. i know this will void warranty

 

Well, I'm not so familiar with a smarty, but make sure that is had emissions delete software on it before switching to the turbo back. There is a great write up in this section on that. The studs can be done separately. Some people say do those with any added power, others say wait till it's a problem, I say do it as soon as you can afford to do it right. I've been running my H&S on level 2, and no head gasket problems, no signs of coolant anywhere that it's not supposed to be, but my clutch is like a fuse here.