Difference of replace spark plugs between M276.9 and M276.8

M276.9 is a naturally aspirated engine, there is an intake manifold on the top of the engine, and with a single air intake filter;

M276.8 is a turbocharged engine without an intake manifold, and have two air intake filter.

For replacing the spark plugs of M276.9, see https://www.leighsr.com/spark-plugs-replace-m276

For replacing the spark plugs of M276.8, see attached documents below: