The dual canister, dual 3.5" tips and dual silencers makes this M-DF a very unique muffler . You won t see the dual 3.5" silencers on the streets all the time, making this muffler very special. The M-DF looks and performs well whether it be a race car, a 4 door, or an everday driven car. This muffler will gain better response on higher RPM, and with silencers on, will reduce the loudness approximately 20-30%.