Take out your rear wiper blade moter/ wiper for 30 ish
Back seat another 40ish
jack/spare another 30 ish to 40
All unecessary parts like tmic cover, battery cover, under tray...
Get some lighter wheels.
Take out subs in teh back
Take out paper in glove compartment lol
Also, take your change out your car cuz thats like 10 pounds
and then finally, your gonna wanna roll around with like half a take o gass.
good 100+ weight reduction right there and your back seat can always just be thrown back in like all the rest of the crap.
Its all unecassary tho because once your 200 pound frriend gets in the car its all back to normal.
Best options is to get more power and if your truly want to reduce weight.
Gut the s*** out of your interior and get a roll cage and harness and a bucket seat and also a bt and also a bigger wing and also some stickers and some rotas