basically the exaust is a 45mm inner and the back box i got is a 60mm inner even though it was said to be for mk3 obviously not mine


nice little picture basically i need a reducer and a bit of piping to fit it propperly as the new backbox is smaller than the standard one on the car at the moment, what is making me confuzed do i just need a 45mm to 60mm reducer being the inner diamiter or bigger!!
so far i got off ebay a reducer that i need the tell them the size and 200mm length of 45mm flexi pipe!