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

Proflow's billet thermostat housings not only look good, but they also get rid of leaky paper gaskets thanks to their O-ring seal design. You can choose the conventional vertical housing or the high-tech 360 degree swivel housing. They're available straight-up or with a 0, 45, or 90 degree angle and come complete with stainless hardware.