 This required the installation of a rollbar in order to not only allow for driver safety, but also make up for the loss of chassis rigidity.The car's Weslake V12 was also no longer legal, requiring Pacific to turn to a twin-turbocharged Nissan 3.0L V6 used in IMSA.The unit required the addition of two inlets to the upper bodywork to serve as air intakes for the turbochargers.