I've posted the listing of mods elwhere under Police packs- The truth. The list is direct from Holden.
It's not about always driving fast as opposed to driving smartly. I can get enought knots up in my Merc at work, but its the way I drive that get's me there just as fast as the speed. On the highway the Chasers are useful for a long haul chase. Some of it too is just the image of the cops haveing an SS- this is a threat thing that must have an impact.