I'm doing my HG's and installing studs. I am also doing the upgraded STC fitting, the upgraded solid turbo oil feed line, the updated oil return from turbo, egr cooler delete, new oil cooler, and blue spring update. Is there anything else that i am missing. if so let me know. I have just about got the heads off, been working on it for a total of about 15 hours so far. Its not too bad, just alot of stuff to remove until you finally get to the root of the problem. I also had the 58 volt upgrade done to my FICM also, it was going bad so had it done. Also putting a coolant filtration system on it also.