I'm curious, did anybody installed a transmission cooler on their auto RX-8?
For US models, one can use the passenger side front bumper opening - to balance the oil cooler on the driver side. Also, what size is the oil cooler?

I'm looking for products at this link:
http://www.horsepowerfreaks.com/viewproduct~Mazda~RX8~~Transmissions~Transmission_ Coolers~.html

B&M's are great. Also check summitracing or jegs, as they sometimes have cheaper pricing. The hose size is 11/32, in case you need extra.