Seems like the Bosch plugs do come pre-gapped, but it is a good idea to check them any way (maybe the box got dropped???), you'll be looking for something like .032" .
Hope this helps.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.