Material: aluminum alloy
Finish:  chrome plated
Water neck connect angle:  21 degree
Application:  Fit For 1966-75 chevy big block(V8) and small block (V6)   
Reference number: refer 2661
Package including: 1 set as shown in the picture
Features:
    Water neck sbc brightens up your engine compartment with a clean custom look.
    Chrome thermostat housing designed specifically for late big block and small block Chevys.
    Thermostat housing Water neck are made of solid steel chrome plated and highly polished.
    Water neck O ring is a perfect fit for a dependable leak proof seal.
    Comes complete with all the necessary hardware for a quick easy installation.