Exterior Modifications
In contrast to some other famous TV cars, the Starsky and Hutch Gran Torinos were unmodified cars. All the body panels were stock along with the interior details. The only visible modifications were the white stripe paint job, wide wheels with distinctive design, and chrome exhaust tips (via Fast Toys Club).
Of course, cars that were used for stunt scenes had modified suspension, beefier frames, and other improvements to endure shooting those demanding scenes.