For sale is a like new in box racing thermostat that fits all N54, some N55 and some N52 engines. It fits specifically those using a plastic thermostat housing.
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The part was never used, only taken out of the box. Decided not to go with it.
This thermostat installs into the OEM plastic housing, and simply opens at an earlier temperature allowing your oil to be cooled down quicker.
All required items are in the box
For fitment check here: https://www.ecstuning.com/b-mishimoto-parts/racing-thermostat/mmts-e90-07~msh/