I've one fitted and there's no cutting necessary. I retained the original twin left pipes and ordered the one to suit. You can get them with twin left and right exhaust cut outs but there would have to be some mods to your existing bumper to fit it.
It does require bonding to your existing bumper( adhesive supplied) but i chose to use 3m double sided automotive tape in case i wanted to remove it easily.
Fairly easy fit even with German instructions as there are photos and all fixings are supplied.
Hope this helps..
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