Alec;1340095 said:All it is is a cat-back. How can you tell it's stock?
i would assume he is saying that bc of how quiet it is..or how quiet it seems to be in the video. sounds good. but most people cry about how the rs-r is too loud. yours doesnt sound as loud as most rs-r's do....which is why i would guess that the other guy thought it was/is stock