Just say “no” to loud exhaust pipes! That’s the message from Samson, manufacturer of the Decibel Killer Mufflers featured here. These 4-inch-diameter slip-ons for 1995-2011 Harley-Davidson Electra Glides and Road Kings limit sound emissions to a claimed 83-85 dB at idle. Baffles are easily removable and even interchangeable, and the Samson name is engraved on the chromed end caps. Suggested retail pricing for a pair of Decibel Killers starts at $599.95.