Surge Tank 32 oz std neck W/ Sight Glass. Large Surge Tank – Designed for large volume cooling systems. The large tank, 1 qt capacity, is utilized throughout the racing industry and are available with billet radiator neck and mounting bracket. Dimensions = 3.50 OD x 7.75 Tall w/ 3.0 center to center bolt spacing mounting bracket. Custom-built by C&R the aluminum surge tanks provide an additional option and the best to filling closed cooling systems and removing damaging air pockets. The sight glass option allows for better view when setting and checking proper water level is available in both models.