The car is a 300d turbo ,1985 .It had the name air technologies ,which is a brand from Honeywell Corp.,Garret turbos is now what its company stamp is.This looks like it was made for the car,it is higher up on the side of the engine and noticeable bigger.The air cleaner we recognize on these 300d s is exchanged for a round air box on the passenger side ,near the headlight,again ,totally stock looking.Was this an optional unit from the factory ? I wonder what the output of this great looking piece of engineering could be.