TracTuff RBB/ RBC Rear Wheel Drive K Swap Water Neck

Description

The RWD upper water neck addresses a few concerns with the growing popularity of swapping the K24A into several front-engine rear-drive chassis.

Normally, the water neck is pretty much right in front of the radiator and the two points are pretty much equal in height… and even then, the K is notorious for being a real bitch to bleed! Rotate the motor 90°, and now you have to make the radiator hose either go up and over or down and under the intake manifold. Both will present problems, but one is uglier than the other, so down and under seems to be the most popular choice!

To help, Pit Garage created a fixture based on the S2000 intake manifold/ water outlet (position and angle), and I had custom tubes bent and welded them to my billet RWD housing… essentially mimicking the geometry of the factory S2000 combo. This option has allowed K swapped S2000’s to reuse the factory upper hose; in fact… I’m starting to see more and more Non-Honda swaps going to that hose to solve their unique swaps connection issues as well. The only shortcoming of this design is that we are taking the cooling system’s highest point and asking it to dive down under the intake manifold, creating a HUGE pocket for air to collect! I highly recommend a swirl pot or fill pot in this space, if possible.

NOTE: Please send an email with your order number and manifold type if not listed. 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).

The billet flange includes a 1/2″ NPT heater port, and the hardware kit includes a 90° heater hose fitting, a 1/2″ NPT plug, four M8 socket head bolts, and a pair of o-rings. The tube is welded so that it mimics the S2000 outlet position when bolted to an engine leaned back 15° (OEM position).