Member Credit: xlack
This is from a G37 but the procedure pretty much identical to Nissan Maximas.
OEM Oil Pan completely stripped of silicon residue:
JWT Oil Pan Spacer:
New silicon applied:
Brush used to remove silicon remains:
This bolt has to be bended in order for the oil pan spacer to fit. (guy from 370z forum had it cut off, but is not necessary):
Bolt is knocked back into position: