Cam belt, also known as a timing belt.
Aftermarket version.
Manufacturer varies, but your belt will be Contitech, Goodyear, Gates, Dayco, CRP, or Pirelli.
NOT for 16v engines
Fits:
924S 86-88
944 83-90
944T 86-90
Reference/Interchange Numbers:
94410515704/944.105.157.04