ACS BASIC MTAuxiliary Cooling System MT 2004 2011 Mazda RX 8 In mild conditions the factory radiator originally equipped in the RX 8 can provide adequate engine cooling with the addition of our cooling fan control kit. Once the engine is subjected to a more demanding operating range, high performance driving or a harsher environment the need for additional cooling can become a necessity. We have designed an auxiliary cooling system that replaces the factory