Kerker, Stout 4" slip-on muffler set. Black 526871
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Product Description:
Comes with an non-disc internal baffle system. Focussed on top-end horsepower. Approximately +17% horsepower & +12% torque + 5dB over stock. Note: Above mentioned performance numbers were achieved by Kerker/Supertrapp on a stock 2012 H-D with stock catalyst equipped head pipe, without any fuel adjustments.