TracTuff RBB/ RBC Filler Neck – V1.2

Description

Whether you have added a radiator that does not have a fill point or you are just in need of a higher fill point to aid in burping the sometimes troublesome cooling system, the filler neck for the K24A, K24A2, K24A4, K24A8, K20Z3, and K20Z4 or anyone using the RAA/ RBB/ RBC/ RSP cylinder head is an entry-level product that gets it done.

The filler neck starts with a beautifully machined 6061-T6 flange that is designed and machined with a large -16 ORB outlet and a 1/2″ NPT heater port. This version has a fabricated exit that points straight forward vs. the OEM outlet angle. The outlet can be configured for a standard hose (1.25″ OD) or -16 male flare.

The hardware kit includes four M8 socket head bolts, a 90° heater hose fitting, a 1/2″ NPT plug, and a pair of o-rings. The filler tube is welded so that it sits level when bolted to an engine leaned back 15° (OEM option) or leaned forward 8° (Gangster Lean engine mount option).

NOTE: 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 engine’s movement does not push/ pull on the radiator and fatigue any parts.

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.