I am using a Type4 cooler in an aluminiumn housing I made and it's fitted behind the LHR wheel.I milled a piece of 20mm thick aluminium with O ring holes to take the standard VW seals and threaded it to take JIC fittings.I used a sandwich plate under the oil filter and made 2 short hoses to hook it up.I modified a Kombi heater assist fan and mounted it above the LH side drive shaft and it's wired into my ECU to start at 105C.I am using a Porsche fan in a Sharpbuilt shroud with the OG oil cooler in the original position and it doesn't supply enough air to the cooler.This now works very well and it's compact and out of the way