Hey mate,
S2 Headlights, S2 Bonnet, S2 Grill, S2 Reo if your using the S2 front bar (or chop your S1 to suit)
The S1 front bar will fit but it will not line up properly under the headlights.
S1 and S2 quarter panels are the same so you wont need the change them.
Hope this helps,
Johno