Equipment :I am replacing my rear bumper. What must I follow?

Cars must have a rear bumper attached the same way it came from the manufacturer. Pick-up trucks do not need a rear bumper.
What is the height requirement for vehicle bumpers?
For cars, the requirement is two-inches plus or minus manufacturers specifications.
Pickup trucks may have up to four-inches plus for tires, and five-inches plus for suspension for a combination of an additional nine-inches over manufacturers specifications.