I don't have the carrera cooler to measure but I remember reading somewhere that the oil path/flow ID need to be somewhere close to 1".
Reading this page,
ELEPHANT RACING 911 Widemouth Oil Cooler, about wide mouth fitting, look like the stock fitting ID is 17.5mm? Am I correct? Anyone measured this? What is correct?
I have a spare thrombone loop cooler. Measured the ID, I found that it is around 20mm.
I bought a used rx-7 cooler recently and found that the bung's ID is around 16mm or 17mm.
Can come one veryfy if these numbers above correct? If so, I don't need to replace the bung. I can just weld on a 16an on top of the existing bung is enough. Am I correct?
Another question I have is about the stock oil filter. Is it on the way oil comming back from the oil cooler into the engine? If it is, then I am safe if I modify the cooler and accidentaly leave some metal shave in the cooler. Correct?
Thanks.