Someone removed the oil filter housing on my car and replaced it with the N/A 900 model so I can no longer hook up the oil cooler. The cooler does not appear to be leaking because there is no oily residue or any dirt build-up around the cooler. Does anyone know of any reasons why the previous owner replaced the oil filter housing and bypassed the oil cooler? Would this also cause my car to run in base boost all the time? Where can I buy the correct housing?