Aluminium intercoolers are an excellent way of safely increasing BHP by reducing the engine's inlet temperatures a denser air charge will enter the engine. This will make more power at the same boost level. Aluminium intercoolers are designed to give maximum cooling capacity while allowing for minimal pressure drops. A black intercooler is more efficient compared with an identical polished unit as the black finish increases the emissivity of the intercooler. Increased emissivity allows the external surface of the intercooler to radiate and disperse heat in a shorter time frame as the temperature differential from inlet to outlet is greater, particularly when the vehicle is stationary.
eBay