Do I need 2 oil coolers?

I've owned a 2004 6 speed rx8 for a year now and I was just driving and I guess my tire somehow caught my bumper because only the driver side part of the bumper got ran over. Anyway, its a mess and my driver side oil cooler is warped. I heard the "AT" (I'm not sure what that means but I assume it means automatic transmission) ones have only one and the "MT" ones have two. and its different for US specs? I live in the US. I just need some advice because 500 dollars for a oil cooler is a lot right now on top of other things. I tried using the search but you know..



Thanks,



itsjustjoe.