OptionZero

I just installed my quick release, hub, and steering wheel into my s14, and thought a quick write up might help those who are looking into doing the same. I scrounged info from Zilvia, Fresh Alloy, ImportNut's FAQ, and others, and hope to simply add or combine it so people have some help if they want to do it in the future.

If you have an S13: no air bag, so nothing to worry about. I believe the Momo hub is only $60 bucks or so, and has hardware to keep the horn function.

If you have an S14 w/ airbag: do what I did, buy the HKB Boss hub, it comes with everything you need to keep the horn, turn signal cancel, AND includes hardware to trick the ECU into thinking the driver airbag is still active, which allows the PASSENGER airbag to stay active. Momo doesn't make an s14-specific hub, you'll lose horn, airbag, and turn sig cancel unless you do serious custom work.

What I used:
HKB Boss Hub (www.racingdimension.com)
NRG Quick Release (SRT Motorsports goup buy here on Zilvia)
Momo Millenium steering wheel (ebay, used)

Tools:
Torx Tamper Proof T-50 L-key (www.mcmaster.com, it's the one with the pin-in-hole design). If you buy the HKB hub, DO NOT BUY a wrench, it comes with it. Other hubs will probably not come with it.
Flathead screw driver
19mm socket w/ extension
allen/hex wrench set (two small sizes needed, sorry I don't have the specific size)

Step Zero:
When you park your car, make sure the wheels are are straight as possible.

Step One:
Pop off the plates on each side of the OEM Steering wheel. Sorry i dont have pix of this. There is one on the left, which comes off easily, and one on the right, where the cruise control stuff is.

Step Two:
Remove the Torx screws, one on each side, which will be visible once you remove the plates. They take some effort to loosen.

Step Three:
Remove the stock airbag, once the Torx screws are off, it should come right off

Step Four:
Unplug all the harnesses, one for the airbag, one for the horn function (green, I believe)

Step Five:
Remove OEM Steering wheel. First, use the 19mm socket to remove the nut at the very center of the steering wheel. I found it necessary to have someone else hold the wheel while I used the socket, just to keep the wheel from rotating. It is fastened quite securely. Once the wheel is off, you should see the yellow clock spring assembly.

Step Six:
Look at the center of the clock spring assembly, and you'll see a blue ring with 3 prongs on it. That controls the turn signal cancellation function.
Place the HKB hub over the clock spring assembly as shown,, and make sure the holes line up with the pegs of the blue ring.. The center shaft has grooves on it, so when you put it on, make sure the hub is as centered as possible (where it says "top" on the hub should point straight up if you are using a Momo or Sparco 6-bolt pattern). Hopefully, you have the front wheels as straight as possible, so the steering wheel will be aligned upon completion. If you are using Nardi, I believe the bolt pattern is different, so TOP will not be TOP for you, but rather rotated one hole over. Try bolting on the steering wheel to see which one fits and how it's aligned. If you are using Nardi, at this point, you're done, because the NRG quick release does not work with Nardi (i think).





Step Seven:
Stick the wiring through the right side hole on the HKB hub and fasten the nut back on the center shaft.



Step Eight:
HKB provides a small resistor to trick the airbag system. It is the small plastic piece with two prongs (red wires). Insert the two prongs into the airbag extension as shown



Step Nine:
Take the small green connector and connect it to the horn wiring as shown



Step Ten:
NRG provides two circular metal plates with its Quick Release. One goes between the hub and the quick release to help conduct the current for the horn. It is VERY important, I could not get the horn to work until I realized that metal plate actually did something.
Take one of the green wires that NRG provides, and attach it to the plate as shown



Step Eleven:
Take the red wire provided by NRG and connect that to the horn connector extension (the green piece) that HKB provided. One end hooks up to the horn connector, the other goes into the Quick Release male piece.
Take the metal plate w/ the green wire now attached, and connect that also to the Quick Release male piece. The male piece is the one with the dimples.



Step Twelve:
Stuff the wiring into the center of the hub. Be careful none of the connectors become loosened in the process.




Bolt the Quick Release to the hub. The metal plate from NRG has many slots for you to stick screws through; if you are using a Momo 6-bolt pattern, use the slots that are recessed towards the center (the inner circle).



Step Thirteen:
Take the horn button, stick the wiring through the center of the steering wheel. Attach the green wire and red wire as shown. Then connect the red and green wires to the plugs inside the quick release, and the wheel to the quick release.



Viola, now you have horn, turn signal cancel, and working passenger airbag.
If your airbag light is still on, you can reset it. Turn your car key in the ignition to the ON position. Open your driver side door, and you'll see the pinswitch (detects if door is open or not). Press the button 5 times inside of 7 seconds. Then press it once more. Turn the car off, then on again. Repeat the 5 buttons inside of 7 seconds, then one more. The air bag light should be fixed.