You should double check on the head gasket part number. Anything manufactured before Oct-Nov 2009 would have been the 928-based units. Also, depending on where you bought them, the reseller may not even be aware of the new design. Cometic's internal part number for the 944-specific version is C4272. The part number for the 928-based version is C5782 & C5783. It's worth checking...

 

Thanks for the heads up. From memory the differences were a that some of the water passages were different, yes?