System Features Water neck riser with 1/2 IN. NPT front side port location and rear corner port locations.New design with 1/2 IN. NPT thread port. Aluminum water neck riser allows installation of a sending unit or connection of a pressure-side heater line or hose when you are unable to use existing manifold outlets. Fitting sold separately. Designed for SB & BB Chevy. Instructions Installation Instructions download Vehicle Fitment warning California Proposition 65 arrow_drop_down WARNING: California proposition 65
