^^ visual inspection can easily let you Google the markings and then you can pull up the data sheets. You can also usually tell right off the bat if they are using "name" brand silicon manufactures.
2001 ZX3 2.0L Zetec-
Hatch Nation #42
Going through Rebuild See "The TICK Build Thread" for details (http://www.focusfanatics.com/forum/showthread.php?t=289168&referrerid=62897)