We sell the radiator hjose kits for the Z32 and own the tooling at the company who makes them for us. The Stillen aluminum one works as well on the bottom. For those who want more of a show look between the upper and lower you need to use the silicone. Both provide the same protection from hose collapse.
Regards
: or upper silicone and a metal lower(not Stillen) radiator hose? : Thanks, : Jeff