Silencer, What are they, do they work good, do they take away performance, and can you use them on non rotory, i have a strait piped bmw and its LoAd, but love the peformance, what can i do?

 

A silencer basically reduces the exhaust noise and you will definitely feel a difference in performance when you use the silencer. The silencer works extremely well if you want to lower the db noise from your exhaust.