Here it is: (Note, this was done in maybe 2002 or 2003 latest. The digicam was not so great then.)
200SX Seat Install to NX
Writen by: Ian Lyn (Pretty White)
Photo by: Q (Lonewolf) and owner.
OK, today we have decided to swap a set of tired NX2000 seats for some updated 200SX SE-R seats. We are going to re-use the NX rails because the 200SX SE-R rails are taller than the stock NX2000 rails and they will make you sit taller in the car and possibly hit your head on the ceiling. Not good if your above 5'7" or more (I am 6'4", so you know I definitely need all the room I can get). We were going to document the removal of the 200SX seats from their rails, but since it is almost identical to removing the NX seats from it's rails, you can use this as a point of reference. They will be removed in the same manner. No need to waste film either.
Tools needed:
– 3/8" ratchet
– 12 and 14mm socket (small) – 3/8 extension
– Flathead screwdriver
– Phillips
– Pair of pliers.

These are the stock NX seats as you can see are in horrible condition. They definitely need replacing.

First you have to remove the seatbelt buckle from the old seat.

Next, you must remove the seat trim around the seats with a phillips screwdriver.

If you pull up the fabric on the side of the seat you will find a 14mm bolt under there. There are actually 4, but we will get to that further in the install.

Reach under the seat side (you may want to unzip the NX seats to get a better view of what you are doing) and unbolt the seats with the 3/8" and the 14mm socket.

Using the bottom of the palm of your hands, hit the ratchet till the screws loosen up. You are doing this to avoid cutting your knuckles up on that round spring.

This is the spring I am telling you to avoid with your knuckles.