STM offers this welded water neck to allow you to run a -12AN fitting from your water neck to radiator. Often running large manifolds, the factory-style coolant hoses get in the way, so running an Evo 5 radiator or half-radiator can eliminate that problem, and this waterneck gives you the option of making your own coolant line.
If you need a whole coolant line and radiator set-up like pictured below, just give us a call.
