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.