Mishimoto 15-20 BMW F8X M3/M4 Performance Air-to-Water Intercooler Power Pack - Frozen Dark BlueCombined with our 16% increase in flow through the core we were able to record a 12 degree F temperature drop in intake air temperatures while testing our full Power Pack. An air to water intercooling system wouldnt be complete without the heat exchanger. When it came to BMWs design, it was a solid foundation, but we still saw room to grow, literally. Our full aluminum design added 6 to the height of the core equating in a 180% increase in external