I have a stock two piece seat for the Spyder F3. This is the Limitied version, that has a little more padding than what came on my 2016 F3-T. The seat came off of a 2017 F3-L. It is in perfect condition and should fit any F3. I used it for one summer before my wife bought me an RDL seat for Christmas. The passenger seat does not include the lock-down post. You would need to reinstall your existing post or buy a new post, part #Lug 708001741. I am asking $350.00 and I will include shipping within the US.