No smog pumps were used on the 1.8L cars. Heavier bumpers are added to the front and rear. New exhaust system for emissions purposes. Fuel pump relocated to front to avoid troublesome vapor lock problem. Heavier bumpers like the 1.8, relocation of the fuel pump.
Horsepower is down, and engine runs hotter due to the emissions control.
Later cars have many options installed since Porsche wanted to discontinue the model and dispose of its inventory. Here are some extras to look for when buying your car. Sway bars were optional in most years, and it's usually quite uncommon to find a car with them installed. The can be added later on but it can take some time and patience, as well as a little welding. Center Console with Gauges.