They also have alot of those pictures and a good writeup on the Solstice GXP in this months issue of High Performance Pontiac. There is also a feature on a turboed 9-second GTO monster in there as well as an added bonus.

 

That type of filter setup is very common on German cars as well as some volvos.
Really easy to change, a little messy sometimes, but no worse than a side mounted filter. I've done a BMW and a Volvo with that setup.