I took my rack off for the winter, cause it was dragging my gas mileage down to like 24-25 in the cold. I have 2 Thule Peloton bike trays for mine and I love them and would highly recommend them.
you mean that part that makes a pop sound when pushing the bumper back in on both sides? Its like a slide the fits with a groove on the bumper piece.

Damn, your getting 24-25 mpg's? Ever since I owned the car, it's felt like 20-22 mpgs...hahaha. Now it's much worse.