Sparco Ergo fitment???
 

I'm a big & tall guy. 6'3" 250 lbs. Mostly upper body, broad shoulders, and "love handles" so seating comfort in the stock seats is somewhat uncomfortable. This Sparco seat would be perfect, but my concern is this:

Would the large version of this seat be too big to even fit in a BRZ?

cant really "confirm" it, but i think it'll fit. i have the chrono road seat, and my bottom side bolsters barely fit (while allowing front/back sliding space) and the chrono road seems to be a tiny bit wider than the ergo-2. the shoulder width of the chrono road is less than the ergo-2 and it looks like i have about an inch space between the outer shoulder to the window glass - should be enough to barely squeeze in the ergo-2 shoulder width.

Thanks a lot for the info. I should be ok with the Ergo then.

Just updating this to help anyone else out there that has this issue as well.

After some extensive research, and I do mean extensive. I found the pic posted which shows the interior dimensions of the BRZ/FR-S. Given the dimensions shown, the Sparco Ergo Large probably won't fit along with rails. So I'm going with a smaller wide seat. Maybe the Takata LE wide.