standard exhaust performance

[JonE]

 The LWB front which is available is for the manifold with side draught carburettor, the outlet flange of which is orientated slightly different to the up draught one, this pipe passes under the front cross member which is cut away at a shallower angle. 

 Thanks - I think this is my problem - its an unidentified LWB pipe and I do have sidedraft manifold fitted - fine - but you have confirmed the routing is obviously different. But as its a better diameter for a tight fit onto the silencer I may do that.