This fan (Made in Mexico) is for stock 1600cc engines. 

Special note about fan width:
  It is 35mm ID and 37mm OD.  All late model 1971-on cooling fan are the same size...35MM inside measurement. If you are being told that you are buying a LARGER 37MM fan, this is not true. They are just measuring the fan from the outside edge. Don't be fooled by this misleading practice. 
Will fit 1971 D.P. engines, 

Karmann Ghia with 1600cc D.P. Engine,1971, 1972, 1973 and 1974 
VW Bus with 1600cc D.P. Engine, 1971 
VW Thing with 1600cc D.P. Engine, 1973 and 1974