For Man O’ War, it looks like “P51D_MANOWAR_COCKPIT_GAUGE1.PNG.DDS” is not being used for manifold pressure gauge and tachometer. Instead, “P51D_COCKPIT_GAUGES_ALBD.PNG.DDS” is being used. The biggest issue is with the manifold pressure gauge. This image is how the Man O’ War panel actually looks:
Here is the panel in MSFS:
Here is an alternative view of the actual Man O’ War panel:
This is the manifold pressure gauge being used:
This is the manifold pressure gauge that should be used:
There is a similar issue with the tachometer, as already mentioned. It does appear that "P51D_MANOWAR_COCKPIT_GAUGE1.PNG.DDS” is correctly being used for the engine gauge (oil temperature/oil pressure/fuel pressure gauge combination).
I added this to Bugs & Issues under the Instruments category: Instruments for Man O' War P-51D from MSFS Reno Air Races
Update: The MSFS trailer from last October for Reno Air Races shows the correct manifold pressure and tachometer gauges for Man O’ War
Microsoft Flight Simulator – Reno Air Races – Full Collection - YouTube
This also matches the Man O’ War cockpit image in the Marketplace.