This clamp makes fitting the Clubsport S or TCR muffler a bolt on affair to any MK7 GTI as well as totally reversible. Selling the car? Just unbolt again and slip back on the original muffler.
Note - some late model GTIs have a different diameter exhaust (not 65mm). You can still use the clamp but your exhaust shop will need to make an adaptor.
MK8 GTI in Australia also does not have a 65mm mid-pipe so it will need to be flared or welded.