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And maybe a golf ball cannon?
I was thinking some type of peening system but that damages paint......and I don't want to build up the surface of the car. Would dimpling a kamm-back help or would it be better smooth as the air would be more stable going into the slipstream?
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1991 F-250:
4.9L, Mazda 5 speed, 4.10 10.25" rear
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