Forget your diet, just get a set of these to shed the lbs.
A range of lightwieght carbon seats from single seaters to your beasty. Can be made to fit most.
ReVerie now supply the Mosler factory with there lightwieght carbon seats.

5 basic frame styles.
Composite Fixed Seat Subframe. Mass (Std Version): 305g. Material: Carbon/CarbonKevlar. Finish: Heavy Weave Gloss.
Silver Alloy Monoblock Seat Mounts. Mass: 552g Material: Alloy. Finish:Silver Anodised.
Black Steel Seat Mounts. Mass: 1130g. Material: Steel. Finish:Black
Lotus 340r, Adjustable. Material: Steel. Fitment For: Majority of vehicles allowing direct (adjustable) fitment of Muslanne/X/XR seats
Lotus 340r, Fixed. Fitment For: Majority of vehicles allowing direct (fixed) fitment of Muslanne/X/XR seats

Using only the best composite materials, ReVerie make the toughest & lightest and comfortable seating for your car, supported by fixed or sliding frames & with a wide range of cushion & support options.