The 987.1 (2006-2008) uses a larger non-serviceable IMS bearing with failure rates documented by LN Engineering at less than 1%, while the 987.2 (2009+) eliminated the IMS bearing entirely with the 9A1 engine, making IMS concerns largely overstated for this chassis.
IMS bearing reliability across 987.1 and 987.2 generations
Porsche Cayman (987) · mechanical