The M8 engine has various pros versus the prior Twin Cam engine, however there are a few cons that have surfaced such as the low idle note combined with a choked stock exhaust system that doesn't allow the sound most are used to. S&S Cycle has heard the customers and created the GNX slip-on mufflers. This pair of mufflers combine a 4.5" muffler body equipped with a tuned baffle and finished off with their race inspired end cap, letting the sound and power flow as it should.
150-Horsepower Harley-Davidson | J&P: Custom Motorcycle Builds
124 Cubic Inch Twin Cam FXR | J&P: Custom Motorcycle Builds
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