S&S Cycle SS550-0666 Mk45 4.5" Slip-On Mufflers Black w/Black Thruster End Caps for Touring 17-Up • They also deliver power

• They also deliver power gains over stock that are among the highest in the business

• Shortest warm-up time

hyper-extension and hyperflexion

and all hardware

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S&S Cycle SS550-0666 Mk45 4.5" Slip-On Mufflers Black w/Black Thruster End Caps for Touring 17-Up • They also deliver powerMk45 Slip On Mufflers are the result of decades of riding, racing and tuning. Combining both a stainless steel perforated core baffle with Race TEX cartridge packing, they create a deep rumble and improved horsepower and torque, all while adding a unique look with styled aluminum end caps. FEATURES & BENEFITS 4. 5" design with stainless steel perforated baffle and Race TEX cartridge packing Guardian Black muffler body finish Tuxedo Black Thruster end