So the vent is 50mm wide, will need a 45mm gauge then, can't find a simple 45mm black face oil temp gauge (I don't have boost yet so no point in installing a boost gauge) EDIT: Made a little blanking plate that I'll cover with some fabric I need to decide what I'll insert on it, maybe cut a 45mm hole and put a gauge in it, I don't know... Is there any other solution for oil temp instead of a gauge?