I am planning to swap some RX-8 seats into my '85 GSL.  I started this question in the New Members section while I was waiting to get permission to post.  Here is bottom line:
I think the rotor pattern in the back (headrest area) of the seats are just cool.  So I want them.  Plus, I bet seats have improved in the last 25+ years.  The seats I have sourced are US base model seats, manual adjust, not heated, but do have the air bags (not going to be used).  I have read on the RX-7 Club Forum that these are good bit heavier and the rails won't line up with the FB, FC, FD rails.  So, I know I am in for some fabrication.  Has anyone on this forum installed the RX-8 seats in an FB.  If so, what advice can you give me?
			
			
									
						RX-8 Seats in an FB
RX-8 Seats in an FB
Mike Simonovich
85 GSL - (RE dual Webers, RB exhaust, K&N, ReSpeed heat shield,
2GDFI, 2GFMOC, Eibach Prokits, Tokico Blues, ES poly bushings)
Lawrenceville, GA
			
						85 GSL - (RE dual Webers, RB exhaust, K&N, ReSpeed heat shield,
2GDFI, 2GFMOC, Eibach Prokits, Tokico Blues, ES poly bushings)
Lawrenceville, GA
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				RamoNZ
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Re: RX-8 Seats in an FB
Don't think anyone here has done it - and from what I have read of it, you do need to crack out the welder to make them fit right. 
I dont doubt that they are probably the best seat of the factory options, but the FC seats given they just bolt in were enough of a step up in themselves that I just took that route and have been very happy ever since..
			
			
									
						I dont doubt that they are probably the best seat of the factory options, but the FC seats given they just bolt in were enough of a step up in themselves that I just took that route and have been very happy ever since..
1980 Series 1, Minty Pea Green 13b Turbo
			
						Re: RX-8 Seats in an FB
Yeah, I know you are right the FD seats, are probably every bit the upgrade the RX-8 seats are and they bolt right in.  But that rotor design in the headrest is irresistable right now.  After I fool with them for a while I may change my mind.
			
			
									
						Mike Simonovich
85 GSL - (RE dual Webers, RB exhaust, K&N, ReSpeed heat shield,
2GDFI, 2GFMOC, Eibach Prokits, Tokico Blues, ES poly bushings)
Lawrenceville, GA
			
						85 GSL - (RE dual Webers, RB exhaust, K&N, ReSpeed heat shield,
2GDFI, 2GFMOC, Eibach Prokits, Tokico Blues, ES poly bushings)
Lawrenceville, GA