I turned out all my off cut boxes, chopped up and old exhaust system I built for a golf gti years ago and set about doing the right thing!.....
Here is the stock pipe vs the 2.25" new version....
The rear muffler after it was chopped out the golf system, cleaned up and nodded for its new application....
Now these have an up and over type exhaust when you get to the rear axle. If I'm honest I couldn't be bothered to order in two flanges or v band this one so I used a slip joint and a set of long tabs that I usually use for manifold headers to keep it locked in place....
These are slightly longer than the ones I use on turbo headers like in the pick below.... 321 stainless turbo headers I also use a double slip joint for an added seal but it also still allows the pipes to move as they heat up improving reliability..... short ones pictured here:
