The Zspeedperformance Aluminum Under Shrouds are made of .050" lightweight aluminum and then powder coated matte black!! These also have the oil change access door integrated in the shield just like my other versions for the 350Z and G35! No pulling 12+ bolts and clips off to change you oil! These will also vent/cool better than the OEM shield, Look better ;) and provide better protection to flying objects under your car. We have added venting at the oil pan area to help cool better!All factory hardware can be uses to mount, If you don't have it you can purchase below.