This is what i did when i install the carbon fiver hatch .
Stock hatch = 32.2
Stock glass = 19.2
Stck spoiler= 12.4
Total= 63.8 (with no wiper and motor)
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Carbon fiber hatch = 20.6
Lexan glass = 12.0
Total = 32.6
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So now i have:
Carbon fiver hatch = 20.6
Stock glass = 19.2
Total = 39.8
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The weigh saving with out the spoiler is 30.8 and if you want to put the stock spolier back on it still will be 18.4 less.
there's some pics:
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