TracTuff RBB/ RBC Rear Wheel Drive K Swap Water Neck

The K Series RWD upper water neck addresses a few concerns for the community swapping a K24A into various front-engine rear-drive chassis.

In their native chassis, the K series has been known for its difficulty in bleeding the cooling system. Now rotate the motor 90° and tilt it back to the OEM position, and you have yourself a dilemma. When you create a connection to the radiator where the hose dives down under the intake manifold and reemerges at the water neck, you create a spot for air to accumulate. I take the opportunity and bleed this point in the cooling system.

My water necks start with a billet flange that has been CNC machined in the USA using US-milled and certified 6061-T6 aluminum. The flange started life with a -16 ORB outlet port that has been opened up slightly to receive the 1.25" outlet tube. The flange also has a 1/2" NPT heater out port. 

If the radiator fill point is equal in height to the bleed on this water neck, you should be fine with this entry-level product, but if the radiator fill point is lower... You should be looking at my fill neck at a minimum.

The hardware kit includes four M8 socket head bolts, a 90° heater hose fitting, a 1/2" NPT plug, an EGR Passage Plug, and a pair of o-rings. The swirl pot is welded so it sits level when bolted to an engine leaned back 15°.

NOTE: Made to Order - Please allow 2-3 Business Days for this product to be made and ship - If you are interested in a specific design that varies from this, please email us at sales@tractuff.com.

The fixture used to make these allows me to reproduce the S2000 outlet position for all but the Skunk2 manifolds. The position will be slightly lower to avoid the intake manifold's features.