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6521B | Neighbor Hater Dual Cut Slip-On Muffler - Black - FLSB '18-'20 pint glass 1989-2006 Harley-Davidson Electra Glide UltraCobra 6521B Dual Cut Muffler for FLSB Black A bit louder than Cobra's standard offerings It produces that deep rumble you expect, but with a more emphatic level It has the same sound as the original Neighbor Hater, but in a more sophisticated design Its machined, dual cut tip gives this muffler a high class look to match its roar CALIFORNIA WARNING: The California Air Resources Board ("CARB") does not permit the use of aftermarket exhaust systems that