It's not gonna be cheap. You gotta buy the motors & custome mount them, then you gotta buy the rails & you gotta get power to the motors & switches. Too much hassle & money. There's really no point in getting power seats if you're the only one who drives the car. Once you have your seat in the position that you like, there's no point to move it.
It would be very cool if you did it. An older modle celica came with them (the awd turbo). It might be cheaper and more worth your money to install seat heaters instead. There are companies that do that install.
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