has anyone tried diffusers from aftermarket brands?

[crowdo]

Hey folks, has anyone tried diffusers from aftermarket brands? Do they actually improve performance or just aesthetics?

[kreoto]

Hi! It depends on the brand, but if you're looking for diffusers that are both functional and stylish, Renegade Design https://rng-t.com/ makes excellent options. Their carbon fiber diffusers are especially nice — lightweight, durable, and actually contribute a bit to aerodynamics. I wouldn't expect a night-and-day performance change, but they do help with airflow and add a much cleaner, performance-oriented look to the rear of the car. I've seen them used on BMWs and Audis, and the fit and finish are spot on.