Alfaholics front pipe for cf2 motors

[bix]

Hi all,
Does anyone have any thoughts whether the front exhaust pipe on a GTV cf2 motor would also fit a 156 cf2?

Alfaholics are selling these specifically for GTVs and are unsure if it is also compatible with a 156.
http://www.alfaholics.com/2010/07/ts-front-pipe-126/