I have just finished a LS Swap into a 2000 BMW 323C1. It is a 2005 LM7 with a 2002 LS! computer intake and accessories. It is a manual. I removed all of the emissions stuff, set the Cylinder volume to a 5.3 from 5.7 and removed VATS. It starts and runs great however I keep getting the codes below. Idle is good What do I need to do to address these? Any concern? Any help is appreciated!!

P0135 O2S Heater Performance Bank 1 Sensor 1
P0155 O2S Heater Performance Bank 2 Sensor 1
P0507 IAC RPM Too High