I have the DCAI, 61mm pulle, Looped fuel rail, and the 550cc injectors and the SL55 pump. No issues for me.
I got my looped fuel rail and injectors from a guy in Columbus OH that was much better deal than TTM.
I even had him weld on a fuel pressure port in the back of the fuel rail for both looks and functionality. The Fuel pressure port in the front was cut off for a cleaner look. Looks great but was a big pain in the behind to put on.
Thanks to Grip Grip though it was easy. Ill see if I have a pic to upload.
Forgot the pic of the rail is my profile pic. Take a look.