The de-cat front pipe is identical to the standard pipe that it replaces apart from the cat itself (which is inside the tube) and a small heat shield at the cat location. There is a "plug" in it , halfway along the horizontal section on the nearside , this is for the external fuel analyser computer , it's only a 12mm brass plug , that surely can't be £64
, and you just use the one from the standard pipe anyway so why buy one ?
I have fitted a 54mm full system to a 999S , taken it off that and fitted it to a 749S , and fitted an assymetric system to my 749R and never , ever seen anything which could be described as a "fitting plug" , I'll not get to sleep tonight unless I find out what it is now
