http://killerchiller.com
Pretty much what the guy said above. They're marketed for A/W intercooler tanks. I almost put one on my lightning, but I live in the south and the tradeoffs for decreased air-conditioning performance and cooler IAT's weren't worth it to me.
Pretty interesting. From their FAQ:
Q: Since the KC piggy backs the vehicles AC won’t you lose horse power?
A: The AC system takes about 7 HP from the engine when engaged. Since the compressor kicks off at wide open throttle, and your IC fluid is your reserve, there is no power loss at WOT. Also the system will prevent power loss due to supercharger heat soak, and timing retard. Average gain back on a stock setup is around 40-50 HP, and more for a modified setup.
So if I understand this correctly, when you are cruising around, you'd be down some power from the A/C running when it otherwise would not be running, and you IC fluid would be super cold. Then you go WOT, power is higher than it would have been without the super cold IC fluid, but the A/C compressor isn't running so you aren't losing any power at WOT. The IC fluid hasn't warmed up dramatically because WOT is brief. When you are back off the throttle, A/C compressor is back on and cooling everything down and consuming some power when you don't really care. I can get on board with all that.
If I read it carelessly it looks like the A/C compressor costs 7hp, but the cooling of the IC fluid gives you 40-50, with a significant net gain. But I don't think that's how it works at all.
Scenario 1: mellow driving / AC compressor on / fluid getting really cold / net power to the wheels at given throttle level is lower than without the chiller
Scenario 2: brief wot / AC compressor off / fluid already cold, but becoming warmer / net power to the wheels is higher than without the chiller
Scenario 3: track (constant aggressive driving) / AC frequently off, but briefly on / fluid cooling for brief moments, but frequently warming / net power to the wheels is lower when throttle is not high enough to turn off the AC compressor and I SUSPECT the chiller wouldn't have enough time or efficiency to make a significant difference in IC fluid temps so net power to the wheels at WOT wouldn't be measurably different than without the chiller
It seems like if you are willing to consume more fuel for a given power level to the wheels while driving casually or idling to give yourself more power for brief pulls, then this is worth it all day long. There's no free lunch though.