[SD987]

With regard to GIAC specifically, they've created performance tuning software for most of the 986 variants, but not specifically for the 987 so I'd be curious what is being sold to you, it's often helpful to read the fine print. Their 986 software is compatible with 91 fuel (but apparently requires a CAI for optimization).

There are entire web pages devoted to speculating on forthcoming Porsche models, so I won't comment other than to say that Porsche will do what it has to to be competitive...but just. Thankfully the other German auto-makers are engaged in a substantial HP war otherwise we'd see the miserly improvements in power that marked the course of the 986 evolution.