Tesla Model S Carbon Fiber Rear Lower BumperMDI Carbon Fiber Rear Lower Bumper for Tesla Model S Does not include the Diffuser diffuser that attaches below the lower bumper as shown in pictures. All our carbon fiber Rear Lower Bumper are made with an Autoclave process, which uses the highest quality TORAYCA PREPREG carbon fiber fabric from Japan. More information on the manufacturers specifications: Finishes and Materials! Cures at 400 degrees and a pressure of 5Kg cm. One of the most advanced