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			I have a GT3 Mk1 bumper and the optional lip "spoiler" is called a splitter.  The do tend to scrape on steep dips  unless you take them at an angle, but the plastic is actually pretty hardy.  You can use a file to dress them up most of the time unless the hit is very hard.  regardless, they only cost about $70 from Suncoast so I just keep a spare around for when I will inevitably break it.
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