MR2 MK2 weight reduction

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For a beginner who wants to reduce weight on the car, what are the best price:performance weight reduction modifications that can be done? My budget is not that small, but I would still like to start with the parts that have the most benefit, obviously. I came across this nice list: http://www.jekylhyderacing.com/weight.htm Where would you guys start? My car (unfortunately) has some body kit that I do not know the name of, but I can only imagine it only adds weight instead of