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When you add a Rear Diffuser to your Dodge Dart, the air flows under your car from the front and sides, accelerating and reducing pressure. There is a suction peak at the transition of the flat bottom and Diffuser. The Rear Diffuser then eases this high velocity air back to normal velocity, and also helps fill in the area behind the car. This makes the whole underbody a more efficient downforce producing device by reducing drag on the car and increasing downforce. The Rear Diffuser also imparts upward momentum to the air which further increases downforce.
Bottom line: Your Dodge Dart gets quicker and looks better.
View installation instructions: here.
2013 2014 2015