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Sorry, but I'm not really into most of the "fashion statement" mufflers with all the burnt tips, oversized end caps, overpriced materials etc. I just fabbed up this simple dual muffler set up that is all thin wall stainless and only weighs about 8 lbs!
I just finished it up today, so no sound clips yet. It's certainly not quiet and has a bit of resonance in certain situations (mostly high load, low RPM), but I don't have anything to compare to. The sound at high RPM is not as loud as I thought and REALLY sounds good. The first muffler is 3.5" OD, 2.5" core and about 10" long. The second one is 4.5" OD, 2.5 core and about 12" long.