Change the handling by making modifications to the suspension for additional grip, less roll or other benefits. This may entail the design and replacement of stock parts with custom-designed parts. Tesla used to offer a Performance Plus Package option that stiffens key suspension linkages and tuning dampers to increase lateral stiffness. This was only available on the P85, and it must have 21″ rims. The P85+ (now discontinued) and the P85D includes the suspension package.
Rear Camber – controls the angle of the tire. On the Model S, the rear camber is fixed at about -1.9 degrees. Design modifications to reduce the camber to -0.8 degrees. Titanium replacement parts were available prior to May-2015 at the OpenEV Store.
(Image used with permission from the OpenEV Store)
How have things gone with this new hardware?
Not sure. I’ve never installed them myself and designer no longer sells them. I suspect it was more a liability issue than one of functionality.