This photo shows a full on race motor installed in a fairly stock manner. RHD harness has been flipped in the splice box here. Also, note the ITG filter connected via rubber hose to the CF intake.
RHD E36 install. Note the euro airbox, stock intake manifld, and the euro radiator cover.
Race applications would usually dictate an aftermarket oil-vapor separator. Mine drains to the oil pan as shown. When it vents into the intake manifold, fouling of the plugs may occure at prolonged high rpm.
I opted for an aftermarket reservoir for the cooling system. It allows for custom selection of caps.
Oil lines may be damaged in transit or harvesting of engines. In my case, I cut damaged ones, swedged on AN 12 fittings, and went to an aftermarket cooler that exheeds factory cooling capacity and volume.
This is the obligatory prankster sticker placed on the CF intake. (its an actual BMW part of course!)