Isuzu G-series Twin Cam

I have come across listings for what are said to be cam bearings for Isuzu G161, G180 and G200 engines although they don't mention the suffix. I'm still trying to find out more about them. i suspect they may be the part number for the auxiliary camshaft bearings.

The part number is 3C1190S.

I'm pretty certain that's SOHC. It is not an "uncommon" shell.