When lightening a car you still need to think about if this is a track only car or still used on the road. Some items people remove make no difference at all as more often than not you need to replace something else! Mine is partially stripped but is still road legal and is used for work on occassions. So on that score the heater matrix is staying put as lightweight units don't help to keep you warm or demist the car in winter.
You remove door cards and replace with alloy sheet, probably zero difference in weight once you add fixings! How many people can afford carbon fibre?
Mine still has its dashboard, no carpets, no soundproofing, no plastic trims around the pillars, no rear seats or belts. Battery moved to the inside behind the passenger seat and two bucket seats.
Under bonnet items removed, soundproofing, engine covers, redundant brackets etc. Boot cleared of all carpets, trim and just leaves a spare for getting about, gets removed on track days.
Stereo and front speakers in place all the time it is used on the road, removed for track use. Had enough of the phone and earpiece!
Glass windows still in place as used everyday, polycarbonate okay, but if a daily driver it gets hot in the summer! Also what will the insurance company load your premiums if you have plastic windows? I know they are tough but can bend
As said, lightweight alloys make a difference as unspring weight but they need to be strong.
Carbon fibre panels, hmmm nice but darned expensive, circa £650 for the MG bonnet, a third of the cars value!
