As for the muffler, I am very satisfied with it as it complies with current regulations, has good sound pressure and sounds good too.
The styling also changes, so it's easy to tell that you've changed the muffler.
The front under spoiler is larger than I expected and looks very impressive, but on the other hand it makes the sides look a bit lonely, which is probably a problem.

●Pirori-san (Roadster/ND) from Osaka Prefecture