honestly CTS has been fine for me, CAI, turbo elbow, outlet, muff delete. fitment was all fine. I say CTS > IE . no need to spend 100$ on a turbo elbow from IE
Do you have the new cast CTS turbo inlet? Because I have the older version and you can't even compare it to the IE one. My CTS turbo inlet deformed just from tightening the hose clamp.