proflow water neck spacer 2, billet aluminium, silver, 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.