Seats and a 5-speed look like additions to the car. https://collectingcars.com/for-sale/1973-bmw-e9-3-0-csl?fbclid=IwAR2PmOgL12tceokJhkKLDSZxVIgMPa7DtVOvzxTVzC56fs8BIMUx637DNuI