A suspension lift of about 75 mm using stock springs and AEV - Bilstein - tuned digressive - valving series 5100 shocks is not a collection of parts but rather an engineered system that provides
roll control equal to or better than original, and meets the same motor vehicle safety standards as production trucks; in combination with the fender flares, it allows no - rub fitment of the big tires without astronomic ride height.
An automatic ride
control system without
equal in the motoring world was the major technical innovation of the
Rolls - Royce Silver Spirit II and
Rolls - Royce Silver Spur II which made their debut at the 1989 Frankfurt Motor Show.