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11. The lack of fenders creates a small nose, so most Modified racers struggle to create adequate front downforce. One way to increase the efficiency of the front of the car when it comes to down force is to build a chin spoiler that seals against the track to keep as much air as possible from getting underneath the car. And remember, downforce on the straights isn’t where you need it. Make sure the front is sealed to the track when the car is at attitude through the turns.