Naah - it's just the way the reinforcing bracket is pressed that makes it look dented, and in any case an inch less rubber would improve clearance.Do post pictures - I might have a narrow minded view about the benefit of bumpstops on the back of a R4.
No not the pieces on the bumper.
it is a piece of deformable rubber attached to the chassis of the car inside the wheel arch to prevent the suspension hitting the body as it uses its full travel.