I can't tell what part 12 is, but I just installed tow hooks on my ZJ the other day, and you definitely need 10, 11, 13 and 14. 10 is the hook, 11 is the main bracket everything bolts to, 13 is the little bolts that need to slip under the radiator, and 14 is the nut reinforcement plate that slips into the unibody from the front, you'll of course also need all grade 8 bolts and nuts if they aren't included. 4 bolts (i used 3/8ths) and 4 nuts for each tow hook plate, and number 13 SHOULD come with the nuts, but if not, you'll need two nuts for both sides for that as well. But I still have no clue what that #12 is, I didn't have that on my (factory) hooks.
EDIT: nvm, now I remember what 12 is, and yes, you'll need it. so you need 10, 11, 12, 13 and 14, and 2 of each.
'98 ZJ Laredo, 4.0L, 140K, NP242, stock. (Sold @205k)
'99 WJ Laredo, 4.7L, 175K, NP249, stock. (Sold @240k)
'97 ZJ Limited, 4.0L, 109K, NP249, stock.(Current)
Last edited by MyZJ98; 10-25-2009 at 06:03 PM..