I will try add the weights of replacement items directly bellow OEM aswell
Exterior
OEM Bonnet - Kg
(Sound Deadening - Kg)
> Carbon Seibon Bonnet - 4Kg approx
Under bonnet wing / flitch covers (facelift only) - .082Kg each
OEM Rear Hatch (Exc Glass) - 17kg
> Carbon Rear Hatch - 7Kg
OEM Rear Glass - 5kg
>Perspex Window - 2.5kg
OEM Front Windows
> Lexan window 1.8kg each
OEM Side Rear Windows - 3.6Kg Each
> Perspex Window - 800g each
Front Fog Lights - Kg
Oem Alloy with 205/45/17 - 21.5Kg
>Rota Torque with 215/45/17 Toyo R888 - 18.5Kg
Wing Mirror trims - 0.034kg
Rear wiper motor alone - 900g (0.9Kg)
Rear wiper arm alone - 166g (0.2Kg)
Yellow speed track spec front coilovers 6.7kg each, rear 2.7kg each
Interior
Front Seatbelts - 3.5Kg Each
>6Point Harness - Kg
Rear Seatbelts - 2Kg Each
Misc Seatbelt parts - 2.6Kg
Side rear plastics - 3.25Kg Each
Rear Speakers - 0.156Kg Each
Rear Speaker Covers - 0.2Kg
C Pillar Plastics - 0.322Kg Each
Remaining Plastics in boot (exc hatch) - 2.05Kg
Bottom Hatch Plastics inc Sound Deadening - 1.4kg
Rear wiper motor - 0.9kg
Rear wiper arm - 0.166Kg
left / right hatch trim 0.216kg
Parcel Shelf 1.815kg
Boot Carpet - 1.8Kg
B Pillar Plasitcs - 0.4Kg Each
B Pillar Floor Plastics - 0.295Kg Each
Rear Seat Back (both sides) - 17.1kg
Rear Seat bench - 4.5kg
Rear headrests - 0.548kg
Front Seats - 25Kg Each Approx
>Bucket Seats - 15Kg Each
Front Carpets, Floor sound proofing, Handbrake plastics inc cup holders etc - 11Kg Approx
Silver gearknob garnish (lower dash facia) - 0.088Kg
Roof inc sound Deadening - Kg
Under dash fuse box cover, inc white cushion - 0.232Kg
Sound Deadening Behind Dash - 10 Kg Approx
Interior Heating System - Kg
Front Door Cards - 4Kg
Passenger Airbag - 6.6Kg
Steering Wheel - Kg
Interior condenser rad and pipes - 1765g (1.75Kg)
Air-con pump alone - 5685g (5.8Kg)
All Air-con pipe work, brackets, and bolts - 845g (0.85Kg)
EPS control unit - 835g (0.83Kg)
Air-con condenser fan - 1800g (1.8Kg)
Air-con main condenser rad - 1900 (1.9Kg)
Glove box - 870g (0.9Kg)
Pair of facelift fog lights - 808g (0.8Kg)
Pair of front metal bumper brackets / crumple plates? - 366g (0.3Kg)
Mark Beesly carbon bonnet, 4.3 kg
Other & Modifications
Spare Wheel - 11Kg
Tool Kit + sw bolt - 2.2Kg
Standard Battery - 15Kg Approx
>Race Battery - 5.7Kg
Air Conditioning system - 18Kg
Front Crash Bar - 7Kg
Rear Crash Bar - 7Kg
CPL Racing Oil Cooler Kit - 3.3Kg
OEM Front Calipers inc bolts etc - 5.35kg each
OEM Front Disks - 7kg each
>Stoptech BBK 328mm 2 piece disc - 22Kg
>TGM Brembo Calipers - 6Kg
>TGM Brembo 330mm 1 Piece disk - 8.5Kg Each
>TGM Brembo 2 Piece disk - Kg Each
Super Unleaded - 15Kg per 20 Litres
So if you remove that lot and with a single front bucket Seat you could be heading towards over a 200Kg weight loss
Would like to say a big thanks to everyone thats contributed to the list :salut: