Optional performance goodies include a rear - wheel steering system and limited - slip differential. (cnet.com)
A new optional Performance Package for the WRX Premium features Recaro eight - way power seats, red - painted brake calipers, upgraded Jurid brake pads and the deletion of the moonroof to reduce weight. (paultan.org)
Top speed is nominally capped at 155 mph, however, customers who specify the C63's optional performance package receive a remapped ECU that extends it to a rather more fitting 174 mph. (autoweek.com)