Until now to follow the rules of most sanctioning bodies a remote recovery tank would have to be plumbed off the overflow hose. No need with this dual tank system which has a 1-1/4 quart expansion tank with an attached 1 quart recovery tank. An added bonus is that the recovery tank has a built-in siphon tube which draws the overflowed coolant back into the expansion tank as the coolant cools down. The end result is savings in complexity, weight, clutter, cost, maintenance and forgetting to install a recovery tank off the expansion tank. Fabricated aluminum with integral mounting bracket. Expansion tank has one 1/2" NPT femal fitting on the bottom and one 3/8" NPT female fitting on the side. Billet radiator filler neck accepts Moroso Racing Radiator Caps and standard size caps. The recovery tank has an internal siphon tube which allows the coolant to recirculate from the recovery tank back into the expansion tank 3/8" N.P.T. female fitting with ball valve on bottom of the tank.