Catback system fitment

[Type_S]

Hey guys, got a question here. Whenever we buy catback exhausts, there are difference sizes like 60mm, 70mm etc. How exactly does it fit from the cat with a smaller diameter to the catback exhaust that has a larger diameter?

[bennjamin]

Your chosen exhaust shop that will fit it - can make up a reducer or expander pipe or gasket that can adapt to whatever situation you need. This might require slight modification of your existing or aftermarket exhaust too.