SammichLover
Banned
Ah, so you chopped up something that was meant to be installed on a Honda/Acura body, or something? Left enough of the flat plate to be able to bolt onto the inside of the Model 3's rear shield, with the fins sticking out through cuts you made. Then black silicon to seal. Okay, that makes more sense looking at how this was put together.I used two - 22" x 21" ABS Universal Rear Bumper 4 Fins Diffuser
Can be found on eBay or AliExpress
Did you consider using aluminum instead? Or you didn't have ready access to a brake to bend a 90 at the top, and maybe a 90 lip at the bottom to create even better aero curtains along the bottom edge? Or did you just think the ABS would be better looking longterm, and ultimately at least as durable?