Proflow's RB billet aluminium thermostat housing is designed to to suit Nissan RB30 engines, replacing the top radiator hose outlet completely. It also features a -12AN ORB thread so you can run custom braided hose. Supplied with replacement gaskets and bolts.

More From This Category

Proflow Water Neck O-Ring, Rubber, Water Outlet, fits Billet Water neck TH801, TH804

Proflow Water Neck O-Ring, Rubber, Water Outlet, fits Billet Water neck TH801, TH804

$12.06