Proflow's coolant surge tanks are engineered to eliminate the Standard bubble tank delivered from the factory. They're hand-built from 6061-T6 aluminium, install using all factory hardware, and have all factory hose connections - even the coolant cap is a direct crossover, making installation no more than 10 minutes. The unique Proflow design mimics the same taper and angle of the OE engine cover, giving them a true stylized look while also increasing capacity. These are required when running a high-mount turbo, as the heat generated can damage the factory plastic design.

Note: On FG models, one of the 2 top ports will need to be blocked off with an AN6 plug as only BA/BF models use this extra port.