Intake problems?

[Ryhis]

Have you guys got P2177 System Too Lean Off Idle Bank 1 after installing intake? I drove about 1000km after installing my RamAir cold air intake kit, and then it lost about 70% of its power and threw that code. After clearing codes car feels almost as powerful as before under 4k. I sent a message to RamAir and they said that they have never seen that their intake would need a remap.
Cant find any vacuum leaks, revs hang a bit sometimes, idle is litllebit shaky.

[pudding]

Sounds like there's a beefy air leak downstream of the MAF somewhere.  Have you got VCDS?  Need to have a look at the short and long term fuel trims.  If they are 10+%, all is not well.