...This is a Racing Engine Oil-Filter which replaces the engine-mounted oil-cooler in the 906 and 910 boxer racing engines. If you are considering using one of these units, keep in mind that they are designed as a factory racing component and by no means recommended for street-use in "stop-n'-go" traffic. You "may" get away with using one of these racing oil-filters if you have a rather large front-mounted external oil-cooler, and that may still not be enough. I'll keep you updated once I get my 914-6 GT on the road which has a "Front-Mounted Oil-Cooler"...