One of the users at a Porsche forum posted and provided some information concerning the GT3RS road car. The information isn't verifiable, so please take the whole thing with a grain of salt.
Technical Information GT3 RS:
- 390 HP
- no PCCB but yellow calipers
- Steering wheel with suede rim but retains airbag
- Carbon Fiber look door mirrors
- Air vent in engine cover bigger
- Single mass flywheel
- Suspension: revised and optimized suspension pickup points, stiffer springs and shocks
- Carbon fiber rear wing
- Lighter body shell, lighter rear window (plastic), lighter bonnet (carbon fiber), lightweight battery (50A/hr) and deletion of air con and air bags
The pictures do look photoshopped but one of the administrators at a Porsche forum has been informed that these pictures are accurate to what the production RS will look like. Both the administrator and his informant reside in Germany so I have much faith in them.