Yup straight fit. (I have a '95 S1)
take 3 clips out in the middle at the back where it has 'skyline' on ur boot lid part, remove 3 bolts from each end of the rear bar on the inside (thru the boot). Remove your numberplate and light and then it just slides out. You can use all the factory bolts etc to put it back on, just a matter of sanding it back, priming and spraying. An afternoons work.
The pods get bolted into the side of the rear bar and also into the bit on the back of your mud guard.