I don't remember all the specs of mine. It was B&M about 12" x 14" x 1 or 1.5". It doesn't need much to be better than stock. FC RX-7s used one similar in size to the MKIII's but it was full flow and has an integrated thermostatic bypass. A popular junkyard grab if you're looking to do it on the cheap. It doesn't cool as quickly but unless you're making some serious power anything the stock size or larger will do. For a full flow setup you and a minimum of 1/2"NPT or -10AN for the full circuit.
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