Description The RBB/ RBC flange is beautifully machined from 6061-T6 and incorporates a -16 ORB outlet port and a 1/2″ NPT heater port. Fits the K24A/ A2/ A4/ A8 and K20Z3 or any engine using the RAA/ RBB/ RBC/ RSP cylinder head casting. The hardware kit includes four M8 socket head bolts, a 90° heater hose fitting, a 1/2″ NPT plug, 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
