Guys I have just got a jdm fd and converted from auto to manual. My car has the standard oil cooler and an extra transmission cooler. Can i use the extra cooler to have 2 oil coolers and if so what extra lines do i need?

 

Are you sure it is a trans cooler? I don't recall the car having a trans cooler. Follow the lines. Where do they go?

If it is indeed a trans cooler, It will be easier to get a used, stock, passenger side oil cooler and lines than to try and fab lines to somehow re-use that and reliably plumb it into the main oil system.