Proflow Water Neck Spacer 2, Billet Aluminium, Black, 2 x AN16 outlets, 2 x 1/8in. NTP Ports, For Chevrolet

These 50 mm tall water neck spacers are designed to mount in between the manifold and thermostat housing on SB & BB Chevrolet engines and adds ports to add coolant lines and or sensors. 2 x AN16 ports, 2 x 1/8" NPT ports, 1 x AN8 port.