[rdass623]

if installing one of those mufflers, the secondary cat delete pipes are all but necessary... they actually reduce the drone found between 2 and 3k. also you will have a deeper richer sound. the volume of the exhaust is not bad unless you are getting on it hard. casual driving will produce a mellow deep tone, what I have been told by neighbors is it "sounds like a Porsche should sound". without the cat delete pipes, the note is just louder.