The Mishimoto 15-20 BMW F8X M3/M4 Performance Air-to-Water Intercooler Power Pack - Lime Rock Gray is an aftermarket intercooler designed to improve the performance of the BMW F8X M3/M4. This power pack includes a large, bar-and-plate intercooler core, a high-flow intercooler pump, and a high-efficiency radiator, all of which are designed to reduce air temperatures and increase power output. The intercooler core is constructed from high-quality aluminum and features a lime rock gray finish for a stylish, custom look. The high-flow pump and radiator are designed to provide maximum cooling efficiency and reliability. This power pack is a great option for those looking to improve the performance of their BMW F8X M3/M4.