TracTuff RBB/ RBC Water Neck Flange – Race

The RACE water neck flange is a slimmed-down version of the original. Great choice for someone that doesn’t want the 1/2″ NPT heater port or for those fabrication projects that end up rendering the heater port useless. Fits K24A/ A2/ A4/ A8 and K20Z3 or RAA/ RBB/ RBC/ RSP casting cylinder heads. The flange is beautifully machined from 6061-T6 and incorporates an OEM o-ring groove and a -16 ORB thread. The raised lip that serves as an o-ring seat for -16 ORB thread also doubles as a generous socket that can be used to weld custom projects. The hardware kit includes four M8 socket head bolts, a pair of o-rings, and your choice of 1.25″ hose or a -16 male flare port fitting to create your upper radiator hose. Photo Courtesy of topversion_ek