Quote:

doesn't the Thruxton have a different intake angle that won't work on the BA or SM?



that is what I had heard a number of times. but looking at the manifolds they appear to the same angle. The rubber boots that connect the to the carbs are inverted. The boots look to be the same part just rolled around the manifold 180 degree the change the angle. makes sense, more common parts for the factory.
I dug into it a little further yesterday and it is my throttle linkage running into the frame with the FCRs that would prohibit the use of longer manifolds. I had to modify the throttle cable housings to clear it as it is now, unfortunately no more room left.

05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter