High tensile steel components.

[RobertKing]

Most of the frame, suspension and supports are aluminum. There are some steel components but, overall it's aluminum and other alloys. Steel tends to add weight and effect handling overall.Keep in mind, the Boxster, out drove all comers on the track when introduced.

[Bebbetufs]

Thanks. I should have made it clear that I was thinking about the cabin and the steel used in the body. Since it is a cab I thought they might have introduced high tensile steels in for example the door pillars, tunnel and floor to strengthen the passenger compartment.