Automatic transmission expansion tank by by Moroso 41220. The Moroso automatic transmission expansion tank prevent fluid mist from spraying on the race track surface, behind your car and onto the tires. Pressurized fluid is captured in the expansion tank and will drain back into the transmission as it cools. Excess fluid may also be drained between rounds by using the ball valve. Includes tank mounting bracket. Meets IHRA Top Sportsman and Top Dragster requirement for one pint transmission overflow rule. Dimensions are 9 1/4" high by 2 1/4" wide. Automatic transmission expansion tank Moroso 41220 Moroso-41220 We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page. PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.