It's not a swirl tank, it may look like one but its not, this is the little brother to the swirl tank, the fill pot!
Water does not spin and the inlet/ out configuration does not help to separate air. The fill pot is easier to make and as a result, less expensive, so if you just need a point to fill the cooling system... this is for you!
Our billet water neck incorporates an OEM o-ring grove on the mating surface and a 1/2" NPT water bypass port. All billet parts are CNC machined from US milled 6061 aluminum. The radiator cap bung uses the larger domestic style cap for the largest opening and huge selection of cap offerings.
NOTE: Made to Order... usually a 2-3 day lead time - Contact for ETA - If you are interested in a specific design that varies from this, please email us at firstname.lastname@example.org. If using AN lines we also recommend designing the upper radiator hose so that there is droop/ give so the engines movement and does not push/ pull on the radiator and fatigue any parts. The tank is welded so that it sits level when bolted to an engine leaned back 15° (exhaust side) for the traditional option and leaned forward 8° (intake side) for the lean option.