Depends on the S-Pack mate.
At first I thought that an S was basically an SS with a V6 in it. An S-Pack is actually just an executive with all the SS extras optional. Some S-Packs may have leather, foggies, IRS, Sunroof, LSD, Power Windows, Airbags.
Some S-packs may have nothing, just live axle, standard diff, manual windows and no airbags. They just have the bodykit and exterior appearance of an S/SS.