Not sure if this is in the right section.
I have a mate who has an Astra VXR with an 888/Remus exhaust. Not 100% here. By the looks of things it only has the one box which is the back box.
Right or wrong so far?
Anyway, is it possible to get the Astra VXR sound on the Zaf GSI by fitting a turbo back system but only having a Remus back box?