I found these dimension for aftermarket Recaro Seats that are street legal:
Backrest Height: 830 mm (32.7 inches)
Shoulder Width: 527 mm (20.7 inches)
Seat cushion Width: 535 mm (21.1 inches)
Maximum Seat Cushion Depth: 540 mm (21.3 inches)
Gross Weight: Sport: 37.5 lbs., Sport Topline: 45.2 lbs.
Thus I have a hard time believing that there would be a significant weight decrease from the factory seats unless there are more substantive numbers provided like weight for power seats mechanism and weight for the Gen 5 seats.
2015 CRT 1SS/1LE RS/Recaro's/NPP/Nav/Rear vision pkg./BA speaker upgrade.
ARH 1 7/8 headers, CAI, BMR 1.25 drop springs, JPSS Billet Bushings ...421 whp...so far.