[RodKnock]

The items that added were the fuel level gauge in the odo, carpet the trunk (stops the bulkhead panel from rattling too), S/C vents for the headers, changed mufflers to Hushpower (lower restriction and quieter, allegedly), additional fire extinguisher in front of passenger seat, door hinge covers, corner weighted, an inside gas cap inside the external gas cap for track use, in the engine compartment, an coolant catch can, air vents to both footboxes, etc. That's all that I can remember off the top of my head, but I'm sure there's more.