Higher output alternator (Leece Neville 130amp).
A 160 speedo (calibrated for pacing)
Reinforced floorboards (not visually noticeable)
No underhood liner
Blue silicone coolant hoses
Stiffer, more stable suspension (springs, c/a bushings etc)
Oil Cooler
Buck tags on the radiator core support (to identify the precinct)
Trunk release switch down by the drivers right knee (instead of glovebox)
Keyed alike (1 key for all locks & ignition)
Might be a few others, but that's all I can think of right now
I think they also have a slot shape in the side of the console where the pistol would hang while driving (down by the female seatbelt) ... i'd have to go compare my SSP with my SSC to verify this though.