I think the topic was already there, but unfortunately has disappeared in the sinking. Supposedly I want to expand my Bastuck.. I actually need the Bastuckrohr which is a normal factory tube with me at the moment? I mean the pipe where with other cars of the VSD is I have the 2E engine.. and there is no with VSD. Bzw what advantage/disadvantage do I have if I stab the factory tube through the stainless steel tube?! That I have to replace the MSD I can still understand .. but why I have to replace a factory tube with a stainless steel tube (for better sound) is not quite understandable for me. Here the whole again pictured: Variant 1: CAT – serial tube – Bastuck MSD – Bastuck ESD Variant 2: Kat – Bastuck pipe – Bastuck MSD – Bastuck ESD Where exactly is the difference ??? except the variant 2 is more expensive… Maybe someone has an answer for me Inqui