I was thinking of making this my first mod for my Si Sedan since they announced the release of it a few days ago but I had some questions first. Does anyone know how easy it is to add or remove the silencer on the system? Does the silencer decrease the performance of the exhaust? And also, does the silencer take all the performance sound away or just dampen it to keep it from sounding obnoxious? Last question... I was just curious if there is a noticeable difference in the performance boost with just the exhaust and no other mods added to the car? Any help will be appreciated.