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 Aluminium Water Neck, For Chevrolet Straight O'Ring Style Chrome

Proflow Aluminium Water Neck, For Chevrolet Straight O'Ring Style Chrome

$35.87

Proflow Thermostat, For Ford/Chev 180F Degree, High-Flow, Bypass Valve, Copper/Brass, Stainless Body, 54mm, Each

Proflow Thermostat, For Ford/Chev 180F Degree, High-Flow, Bypass Valve, Copper/Brass, Stainless Body, 54mm, Each

$27.72

Proflow Water Neck, Billet Aluminium, Swivel Black Anodised, 45 Degree, Swivel, For Mazda Series 5

Proflow Water Neck, Billet Aluminium, Swivel Black Anodised, 45 Degree, Swivel, For Mazda Series 5

$159.20