[AcesHigh]

Um. Cooler = good. It is the reason intercoolers force cool air into the engine, and why CAI's try to stay cool. With combustion happening your engine itself will never be cool, but the cooler you can keep the surrounding bay the better. In fact, it would be ideal to have ice packs in the engine bay. (Which some race teams stuff in the intercooler before a race).

Koyo (4th gen), Fluidyne (5th gen), and C&R are prime choices here, but they are considerably expensive. I personally just went ahead and got a simple (and less costly) all metal radiator to replace a leaky OEM plastic one.