Found a source for mandrel bent 304 stainless thick wall tubing for header construction specifically turbo manifolds.
Schedule 10 is listed as 1 1/4 inch but its dimensions are 1.660" OD and 1.442" ID.
This ends up having internal flow between a 1.5" and a 1.625" pipe.
Reasonably priced.
http://www.mandrel-bends.com/catalo...ainless-130-degree-3-0-leg-pipe-bend-884.html
Schedule 10 is listed as 1 1/4 inch but its dimensions are 1.660" OD and 1.442" ID.
This ends up having internal flow between a 1.5" and a 1.625" pipe.
Reasonably priced.
http://www.mandrel-bends.com/catalo...ainless-130-degree-3-0-leg-pipe-bend-884.html