I have an r33 gtst but I never tried to put our skid plate on it. Im thinking the tension rod bracket bolts are the same and the cross member bolt holes are probably different, and I'll have to look at the radiator core support bolt too to see if they are the same or different. If you have more time than I do to measure the widths between these bolts and the position of the oil drain plug then I could easily measure the plate, but my car is buried in the garage at home at the moment.
We made a big production of S13 skid plates and brought down the price to $120! (down from $150)
This 2011 model has the same precision cut aluminum shape as the gen 2 but the finish is anodized silver or gold which is very easy to wipe clean and looks great too. S14 G2 skid plates remain the same brushed aluminum finish but we brought the price down as well.