Hi I wonder if anyone could offer some advice please? I have recently purchased a 2006 3.0si coupe. The previous owner had the rear silencer and associated pipework removed for a straight pipe, noisey affair and I want to put it back to standard. The part I need is 7555350 for the 3.0 si but I have been advised that the silencer and pipes from a 2.5 - part number 7560513 will work just as well as they are the same? Does anyone know if this sounds ok? thanks a lot