BC Racing BR Type Coilover install for Nissan 240SX '89-'94 S13

Start by loosening lugs. Then Jack up the car and support it with jackstands.
Remove wheel to make things easier to work on :)
These 3 nuts on the strut towers will be removed.
Loosen the nuts. You will remove these after getting bottom half of coilovers unbolted.
You will need to remove brake line from coilover.
After it is removed, you are ready to unbolt lower half of coilover.
Loosen and remove the 2 nuts and bolts holding the coilover to the hub assembly.
Pull hub assembly away from coilover. You can now remove the 3 nuts completely off the tower. Pull the coilover out.
Grab the new coilover and feed it underneath the shocktower and make sure it is facing the right way and that you are installing the correct side. Yes, Left and right are different.
Make sure that the coilover is seated correctly by looking at top of shocktower.
You can hold the coilover assembly by finger tightening the nuts. This will allow a little play which will make bolting the lower half easier.
Next, you will want to feed the hub assembly into the coilover and install the nuts and bolts.
You can now tighten the 2 nuts and bolts. Note: If using camber eccentric bolt, you will want to make sure that these bolts are tight because bolt can slip and cause coilover to hit wheel depending on your offset. (don't ask how I know) Even if it is very tight, you will want to recheck after a few miles of driving as driving will wear off the powdercoating under the head of the nut causing it to lose grip. After that, you're all set.
Next tighten the 3 nuts on the shock tower. This is also a good time to install a strut bar if you want.
You can now tighten the brake line onto the coilover and move the steering wheel back and forth to make sure everything clears.
Rears are very easy, same idea as front but less to remove. You will remove these 2 12mm nuts.
Remove the big nut and washer holding the lower part of the coilover to the arm. After you slide the coilover off the lower bolt you will notice it is hard to snake out if not using a lift. You can take it out by standing on the brake assembly to pull it down. This gives more clearance to pull it out through the wheel well.
Snake through the new coilover using same technique as removing it. Feed the two studs through the shock tower and slide the lower part of the coilover on the arm bolt. Install washer and nut, then tighten.
Finally, tighten the 2 nuts onto the shock tower. You may want to adjust the settings at this time. First, turn it all the way to the right. Then count back to desired setting. Counter clockwise makes the setting softer.
Here is a side by side comparison between Tein HE's we removed and the new BC's BR Type Coilovers.