TracTuff RBB/ RBC Filler Neck – V2.2

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.

This filler neck starts with a beautifully machined 6061-T6 flange that incorporates a -16 ORB outlet port and a 1/2″ NPT heater port. The welded outlet can be configured for a standard hose (1.25″ OD) or -16 male flare. This version has a fabricated exit that comes out at a 15° angle and down slightly/

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 sensor port selection is optional; if you don’t have/ need a sensor, don’t select it. I only offer two threads… 1/8″ NPT or 1/8″ BSPT (Honda Single Prong Sensor).