There is a motorsports type AOS available for the m96 engine as I have on fitted to my 987 3.2. It was never generally available and pretty much a development item. It differs from the 996 motorsports AOS in that it has a profile to suit the secondary air pump location specific to the boXster and later cayman. Details of installation and part numbers etc can be found in the tech articles section of planet-9.com
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I still wave at Boxsters, but they no longer wave back :-(
2002 Boxster S "Violet" (sold but not forgotten)
2009 Carrera 4S "Kelsey" (current ride)
2015 FIAT 500e "Nikki" my commuter car