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Old 01-02-2014, 02:29 PM   #525
piknockout
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F. Addition of spoilers, splitters, rear wings, bumper covers, valances,
side skirts, and non-functional sccops/vents is allowed provided that
either:

Notice it doesn't say diffusers. There is not an STX allowance for diffusers, port installed, in a catalog, or otherwise.
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