So I am thinking of buying a RX-7, it would be my first. And I was wondering what the differences are between GT-X and GT-R TB. I have only been looking at stuff on the internet and I haven't really found anything.

 

are those japanese models?

 

yes

 

1990 GTX/GTR, the differences I know of are...(some are the same in other years)

GTX came standard with:
- LSD
- Rear Spoiler
- Leather Wrap Steering Wheel

GTR did not.

Both Came STANDARD with:
- High mounted stop lamp
- AM/FM Radio
- Power window
- Power steering
- Power door locks
- Electric door mirrors
- Fog lamps
- Front Stabilizer
- Rear Stabilizer

 

GT-R and GT-X are JDM trim levels for both S4 and S5's. They do not represent any mechanical difference. Thus the S4 GT-R and GT-X TB's are identical and the S5 GT-R and GT-X TB's are identical. S4 and S5 TB's are not the same, they have different linkages and TPS's.

 

the butterfly and bore size is the same for all FC TB's. 3X45mm if im not mistaken.

 

Correct.