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TracTuff RBB/ RBC Swirl Pot & Overflow


One of the most common questions I get with swirl pots...

Is an overflow is still necessary?

The answer is yes, unless you are interested in one of my true "race" style swirl pots that have a swirl pot and a header tank.

The swirl pot starts with a beautifully machined 6061-T6 flange that incorporates the largest port possible within the OEM gaskets footprint and a 1/2" NPT heater port. The swirl pot and overflow tank bases and lids are each billet and incorporate either a billet radiator cap bung or a vented filler cap. The two tanks are separated by a billet spacer and a plinth (an extra layer of material), essentially doubling the welds footprint, spreading the load between each connection. The outlet can be moved to suit your needs but the most popular choices are listed. The outlet itself can be configured for either standard hose (1.25" OD) or -16 male flare.

I do not recommend this product for any kind of racing ! Due to the weight and despite my attempts to beef it up at all connection points, the product has still had a few failures. If you drive hard... purchase the swirl pot and overflow separately. Please understand I'm trying to manage your expectations, I'm not shitting on my own product. If it were that bad... I'd just stop making them. The reality is, people sometimes do things with parts that go against the manufactures recommendations (which is the case here). Out of the three or four dozen I have made, I have only heard of three having any issues... and those three were pretty much race cars! Purchase a swirl pot and overflow separately if you drive hard.

NOTE: Made to Order - Contact for ETA - If you are interested in a specific design that varies from this, please email us at The 3 o'clock outlet position will NOT WORK with the K20Z3 shift linkage on a 2.0L. 

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.

Due to the location of the swirl pots body, the 90° heater hose fitting I usually include with this flange does not fit. If you would like to retain heat, I can weld a -10 ORB bung to the bottom of the swirl pot for an additional $30. 

The hardware kit includes four M8 stainless steel socket head bolts, a 1/2" NPT plug and either a Genuine Honda gasket or a pair of o-rings. The hardware kit only includes a heater port plug because you cannot fit a fitting to attach a line. The swirl pot 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. A 1/8" NPT inlet/ outlet is located on the bottom of the overflow cylinder.