Just finished installing my Omori egt 45mm (WRX look) gauge to match the Omori boost gauge I did earlier. I used to oem rubber cups to mount them on the steering column. I wish I had done this as one install instead of two- it was quite a ***** to get the other pod mounted w/ the other one already done).
The Omori gauges are a tight fit into the oem pods, but will go- some ATF rubbed on the inner rubber and a thin film on the gauge- help ease them in (I believe the oe gauge is 42mm).
The Omori gauges are a much better match than the oe boost gauge- correct back lighting, needle correct color and as a bonus the read in imperial- psi for boost, F for egt