TracTuff RBB/ RBC Filler Neck - V1
This is the original OEM outlet variant. Modeled after the factory cast piece so you can reuse your OEM hose; this product helps simplify your cooling system, whether you have added a radiator that does not have a radiator cap bung or you are just in need of a higher fill point to aid in burping the sometimes troublesome k series cooling system.
The filler neck 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. This version uses a 30° section of tube to replicate the OEM position. The outlet can be configured for standard hose (1.25" OD) or -16 male flare.
NOTE: Made to Order - Contact for ETA - If you are interested in a specific design that varies from this, please email us at firstname.lastname@example.org. If you have questions related to the configuration or options... PLEASE visit the WHATS WHAT or FAQ page. 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 billet neck has a 1/2" NPT heater port and the hardware kit includes a 5/8" hose fitting, a plug, four stainless M8 socket head bolts, and a Genuine Honda gasket. The filler tube 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.
Photo Courtesy of Manny Cruz