The 997 S pipes are a little bigger .

You can try to get some very thin st.stl. strip material
somewhere to wrap around the pipes.
Try an Automotive supply store.They usually sell various exhaust tips and may have some adapters.

You can also go to a muffler place and see if they can expand the 997 pipes a little, but you would probably have to remove the mufflers.No big deal, but it takes a little time .