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I have the EzCarbon rear diffuser, front ducts, and front splitters, they are real nice, solid fitament, and moderately priced. For the rear splitters I went w Ahacarbon as I found them for $215 shipped. They seem to be a small step above ebay stuff. Figured they at least have a bit of a reputation trying to build the name vs ebay shops, which can vanish anytime.

Overall the Ahacarbon pieces are above average. If you're going for show car, I'd skip them or any ebay stuff. Everything fit fine, but you can see one spot the weaving is wonky, and contours don't line up exactly. Second pic you can see how the OEM splitter follows the bumper, but the Ahacarbon ones have a slight lip. Unless you get down close an examine it, you won't notice. This will do. As with most things, you get what you pay for.