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The 4-inch muffler body is the gold standard for H-D Bagger models. It’s the perfect size for style, sound and performance. For 2017 we offer three versions. Each uses the same internal construction so they will sound the same. The differences are in the tips. We have the straight cut, machined tip, a Scalloped tip that can be rotated in one of three positions, and new for 2017 is our contrast cut tip finished in black with machined aluminum flutes. Each provides increased horsepower and torque with a deeper, more aggressive exhaust note.