So whether the spoiler helps or hurts depends on the car, since the rear window in a hatchback can be at a flatter angle than 45 degrees (5-door Opel Vectra) or almost vertical (Smart Fortwo, Daewoo Tico, most station wagons and SUVs).
So the safest spoiler is a top-mounted, slightly sloping roof extension.
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is where you're going, not how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread
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