To be honest, I'm kinda surprised at how high the TRD rails cause the seat to sit. The Stradia II comes with two different seat options: regular, and super-low. Since I'm kinda on the shorter side myself, I went with the regular, thinking the seat & rails would be much lower than stock. Turns out... nope. TRD states (in Japanese, on their Japan website) that the hip-point for the TRD seats (Stradia II's) is identical to the hip-point on the stock seats. So with mine adjusted the way I like, I'm *maybe* a millimeter or two higher than my ideal position in the stock seats, which I had raised about 1/3 of the way using the height adjustment lever mechanism. I'm happy with the height for daily driving, but people who like to ride low might be disappointed. So for anybody looking at aftermarket seats to help provide headroom for a helmet, make sure to go with the super-low cushion! (Also, I imagine in a few more months Bride will be making extra low seat rails too; they have the option for other cars, just not the FRS/ BRZ yet).

I don't think I'll need one anytime soon. Maybe if this wasn't my daily driver. But I'm not going to be at the track enough to warrant it, and the seat does a good enough job of holding me.

That said, cue the "Ohmergawd, you're gonna die screaming and covered in fire if you use a four-point harness!!!" people in 5... 4... 3... :D

So do you know how much weight do you lost?

Seems that the TRD seats are heavier than the stock seats..

http://www.ft86club.com/forums/showt...=40726&page=67