Pro etune...it's ok to use the Cobb OTS for a few weeks if you must but I wouldn't RECOMMEND living on them, there are a few who will tell you they've driven on them for most of the life of their car, that doesn't necessarily make it the ideal situation. A new PCV plate and or catch can is not a terrible idea. Gap plugs to about .025 to .027 they'll stretch anyways. Always grandma cruise it until your coolant temp and oil temp gauges are pretty well in full warm position and youll start to recognize where that is on the oil gauge as you drive depending on the temp outside sometimes it runs alil cooler so it may sit in different spots, obviously coolant temp is full operating temp when needle is in the middle resting position. It's a wise idea even if your not going stage 2 to do an upgraded core even if you don't do charge pipes the factory intercooler is incredibly inefficient. There's more but I'm at work and trying to remember everything in 5 mins. Some others will post I'm sure. Oh the post facelift model have the upgraded RMM so it's kinda preference on doing an aftermarket one, I am going too on my 2018 ST just because I feel like even the upgraded one still has alot of front and back motion. So that's another idea, shift bushings, bracket bushings...and more.