It is harder, stiffer and tougher than lead. Males tend to have slightly stiffer and thicker coats than females. The prototype chassis was stiffer and heavier than the Miura chassis. Larger brakes and a stiffer suspension also improve performance. A new type of steel alloy was used, making it stiffer and thicker than before. The titanium spindle was later replaced with a lighter and stiffer forged aluminum version. Over time, vascular remodeling causes the affected blood vessels to become progressively stiffer and thicker. Also, they had upgraded suspension with stiffer springs and shocks. The car has stiffer and lower suspension than the regular Corsa as well. It has larger brakes as well as stiffer springs and shocks. The SPG also had a lowered and stiffer suspension. The analog sticks are also noticeably stiffer than on the original DualShock. The D-500-1 had an even stiffer suspension than the D-500. Foams tend to be stiffer at lower temperatures. Collars were taller and stiffer and materials were of a higher quality.