Right first q does any 1 have a set of white dials on an n plate 16 valve (sagem dials)only halfords told me that they dont stock them?whats the difference between sagem and the others? and when i get my cat- de pipe and striaght through system on without the centre box will i have to have any thing done to the fuelling?will the lamba sensor read out wrong and mess the running up?ta