I think bub.com has a sound clip..it's almost funny -to me- they sound kind of like a Harley on steriods!Or with a bunch of compression.Oh yea, you can sure tell the difference--especially after you put the needle & clips to it. before that it pop and back fired--you've got to do that other wise it's guttless..made a bunch of noise..but didn't go anywhere..another thing I forgot to mention was..it's got 40lbs of torque at 3200rpms--a nice wide torque band.I raced a sportster with straight pipes the otherday and blew him away..the guy weighed 65lbs more than I do..so that was some of it..
