aftermarket steering wheel hub
 

hey guys i was gna have a grant gt steering wheel installed on my car but it turns out i need a different hub to make it fit. i have searched online but to be honest i am not sure which one will work. my buddy that was installing the wheel said it needs to be 3bolt but when i look up 88 rx7 all i see is 6bolt. so im little confused, could u guys show me some hubs that will work?

Get a MOMO 6 bolt hub.
then get a "sandwich plate" that converts the hub from 6 bolt to 5 bolt.They are about a half inch thick.
Here: Grant 4008, Grant Steering Wheel Installation Kits | Grant

The reason I say to do it this way is that you can always switch to a MOMO or Nardi wheel and not have to change anything that you already installed on the car.

ok thanks, and this will bolt right up to my 88 fc? i wont have to remove the turn signal lock or the horn?

You need a Steering wheel HUB to put on any aftermarket steering wheel to the car.
The MOMO hub(get correct hub for the car) will attach to the Steering shaft,tighten the nut..hook up horn wires(very easy and self explanatory when you see it),put on steering wheel..done.
Just make sure that the "signal cancellation collar" on the car lines up to the 2 holes in the back of the hub or you will squish it and break it when you crank the 21mm nut down.

so just to be sure i should order these three things?

http://www.amazon.com/dp/B009X1TZ3A?tag=viglink20938-20

http://www.jegs.com/i/Grant/470/4008/10002/-1

http://www.amazon.com/gp/aw/d/B006OHR93Y/ref=mp_s_a_1_fkmr2_1?qid=1427849929&sr=8-1-fkmr2&pi=AC_SX110_SY165_QL70&keywords=88+mazda+rx7 +steering+wheel+hub

this:
http://www.ebay.com/itm/MOMO-MAZDA-Miata-Steering-Wheel-Hub-Adapter-/231128365705?fits=Make%3AMazda%7CModel%3ARX-7&hash=item35d052fa89&vxp=mtr
attach this to make the grant wheel fit to the momo hub.
Grant 4008, Grant Steering Wheel Installation Kits | Grant

and a grant wheel..like this? maybe?
http://www.ebay.com/itm/Grant-GT-BLACK-Steering-Wheel-14POLISHED-ALUMINUM-RESTORED-VERY-NICE-/271818516941?hash=item3f49a569cd&vxp=mtr
Strictly all suggestions.
The thing about Grant wheels are they are so limited to style and need the specific 5 bolt pattern to install.
BUT MOMO is fairly common with a Six bolt pattern so a lot of options arise for style,size.,etc.
Before you even buy off Ebay,you may want to try to see if anyone on Forum is selling a Hub.(your post count looks good enough to submit a WTB in the WTB section and the main SEC GEN parts for Sale section).