Triumph GT6 and Spitfire 6 cyl custom header.  After buying 2  header for a GT6  and having them not fit with a Weber Intake manifold i built my own.  This header will fir a GT6 and a Spit 6.  It fits with a stock inlet manifold and a Weber manifold.   The flange is 3/8 thick cut on a water jet machine.  The tubes are 1/4 with a 2 inch collector.  As you can see from some of the pictures it has GREAT ground clearance.  It is a a 6-2-1 design.  We did our best to keep the tubes as equal as possible.