Given the owner current situation it would probably be best to drive a few hrs and get the job done by the BMW tech, while he is there get other common engine problems taken care of. This seems the most inexpensive option


06 4.8is Imola Red Euro Xenon, Eisenmann Sport
99 M3 Dinan CAI & Exhaust
03 330 XI, 89 325ic, 89 325ix
87 Benz SDL