Proflow Water Neck, 90 Degree, Swivel, For Ford Barra 4.0L, EF-FG XR6, Billet Aluminium, Black Anodised - PFETH-809BKPart Number: PFETH 809BK Proflow's billet thermostat housings not only look good, but they also get rid of leaky paper gaskets thanks to their viton o ring seal design. This thermostat housing has been modified for 2023 which now features an overall lower profile housing, and an extended outlet fitting for better fitment. It now also comes with both a barbed outlet fitting and an AN4 plug if required. Stainless steel hardware is included.