Tried my decibel meter yesterday on my Diesel with turbocharger and gutted muffler vs my 700TRV with a Speedwerx muffler. Hmm, kinda surprised, while they both have way different sounds, at idle, they were both 73db at the position of my head. Exhaust on the Diesel was actually 1 or 2 db less! Diesel, however has a way cooler exhaust note. At wot, the Diesel is also quieter! I did add the "storage box" from a 700 TRV and put 2" of sound deadener in the box. I relocated the air intake to the old battery location when I did the turbo. Hated the factory Mann Hummel monstrosity. Here is an old pic showing my battery relocate (Yellow Top) and my modified stock muffler, gutted and bigger tip. Black was primer. You can see my intercooler in front of my radiator as well.
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