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! The inlet/ outlet configuration doesn't do anything to actively separate air like the wrapped and staggered inlet/ outlet found on a swirl pot and as a result... the fill pot is easier to make, resulting in a less expensive product. So if you just want a fill point that does a better job catching passing air than a filler neck, this is for you!
The fill pot starts with a beautifully machined 6061-T6 flange that incorporates the largest port possible within the OEM gaskets footprint, a 1/2" NPT water bypass port, and machined o-ring groove for the OEM gasket. You can choose to have a 1/8" NPT sensor port added directly to the top of the neck (near the logo) or the side (under the outlet) as well as choose from a number of accessory bung options on the tank. The outlet can be moved wherever you want but the most popular choices are listed. The outlet itself can be configured for standard hose (1.25" OD) or -16 male flare.
NOTE: Made to Order - Contact for ETA and/or if you are interested in a specific design that varies from this, please email us at email@example.com or if you have questions related to the configuration or options. The cap bung has a 1/16" NPT port for connection to an overflow and uses early model Honda radiator caps; such as an 88'-91' Civic/ CRX or 90'-93' Integra. If you are using AN lines, I 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 hardware kit includes two stainless M6 socket head bolts and a Genuine Honda gasket. The tank is welded so that it sits level when bolted to an engine leaned back 15° (OEM position) for the traditional option and leaned forward 8° (intake side) for the gangster lean mount option.