Replacement of the standard front braces on the Porsche 911 2012. They are the right length and they work. The large barrel was about 3/4 inch taller with a shorter stem. It was noticeably heavier, so after weighing it was about 4 ounces heavier. X2 is 8 ounces or half a pound. I know it's not much, but if you care about every gram of your supercar, you might want to go with a Porsche OEM. I'll stick with the cheaper option and drop half a pound on race days.