I had the dealer install it when the car was new.Above all, I liked this demo car style and purchased the car, so if it weren't for this styling, I might not have purchased the Roadster RF itself.I'm so in love with it.
I've had it on since it was new, so I don't know if it's effective, but above all, I think it's cool, so I don't care about anything else.

Kanagawa Prefecture Soda-san (Roadster/NDRF)