The MY06+ fuel system is enough for 380whp with RC650 injectors that it comes with (not the tuner system tho).

You can run 14lbs with ID1000cc injectors and walbro.

 

I talked w/Chris @ SOS today and he said that if you're planning on more than 400hp you will need to upgrade to a return system sourcing parts from an AP1 like fuel rail, fpr etc. What throws me off is guys are running turbo setups with more power and are not upgrading their fuel systems. There seems to be a gray area on what to do with the fuel system on MY06+. If it's just a fuel pump swap then we are good to go. If it's more involved, then let someone else be the guinea pig.