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 increasing capacity.