Ive never heard one in person with all the resonators in tact. But with the large round resonator delete it probably drones a little more but not annoying, and once you get past 2600rpm it starts to sound stock again until you burry your foot into the throttle...
Overall i am very pleased with it.

 

nice going boys, RPI is heard of in Hong Kong now,
good luck in becoming the "new AC" cos you actually give dynos to
back up your product, very professional.

 

well guys here is the magnaflow exhuast!

 

Congrats on the new setup!