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. supplied with 1.1 bar cap.