I remember reading up about this in a magazine sometime ago but I thought it was a complete exhaust system. Came across this here silencer and thought it was pretty freaking sweet. Something for some to consider if you need to silence but want full power under full load. Only if I had the money.

http://www.horsepowerfreaks.com/partreviews/Apexi/Exhaust/Exhaust_Silencers/ATS/7030

98' Eclipse GS- Hahn Stage 2- SOLD
02' Honda S2000- SOLD
04' Acura TL- Current Whip