I kept post ponding this mess, but it's time to do it, so I was wondering if I can install the original BMW NGK 4 head plugs? those are the same size for the M50 engine, I guess the M70 has the same size, but I couldn't get any confirmation from the dealer.

Advice me .. I would also love to see some pics of someone changing plugs for the 850, this is not like the 750 as the 7 series got more room then the 8 series I guess.