it is kind of interesting, i was looking at
oil coolers and went to setrab site, they list their coolers with hp ratings, most of the sizes used in the cobras are rated for 2-300 hp, which is probably all that is used for driving down the road. to cool something rated at 400-550 hp it takes about a 10" tall x 16" wide cooler according to their listings.
Setrab Engine Oil Coolers | susa