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update
About a week ago, I posted a mock up of a planned front air dam on my 99 Malibu. Based on suggestions here I made some changes. Its now shorter, rounded on the edges, and its angled as to deflect air upward and around the car.
Pictures are below. Also, there is a partial belly pan that is not visible in the pictures
I tested it out today on a 30 mile drive and I made a few observations. One, without having done a formal coast down test the car seemed to maintain speed slightly longer after after letting off the accelerator. And two, the engine was running a little hotter than usual so I will probably have to cut a small hole in the the front to let some air in to keep the temperature down.
The beauty of the air dam is that its attached to the car completely with velcro so its easy to remove and modify. Let me know what you think.
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