There are a few things you can do to make sure that your spoiler doesn’t spoil the surprise of your car’s upcoming performance. One is to make sure that the spoiler is made from a durable and long-lasting material, such as plastic or metal. Another is to make sure that it’s properly attached to the car, so that it won’t move or flutter when the car accelerates or decelerates. Finally, be sure to keep track of where the spoiler is located on the car, so you can easily remove it if necessary.