S&S CYCLE 1801-1075 550-0664 4-1/2" MK45 Performance Mufflers — Thruster - Black Thruster

Features Mk45 4-1/2" Touring Mufflers are the result of decades of riding, racing and tuning Combines both a stainless steel baffle and RaceTEX cartridge packing Create a deep rumble and improved horsepower and torque, all while adding a unique look with styled aluminum endcaps Removable dB reducer Made in U.S.A. Notes Not for Trike applications WARNING Qualified manufacturer declared replacement part on all '17-'23 model year M-Eight powered FL touring models. Specs Product Name Muffler Type Slip-On Model MK45 Muffler Color/Finish Chrome End Cap Style Thruster End Cap Material Aluminum End Cap Color/Finish Black / Polished Outer Diameter 4-1/2" Units Pair Riding Style Street Fitments 2025 Harley-Davidson FLHXU Street Glide Ultra - - 2025 Harley-Davidson Electra Glide Police FLHTP - - 2025 Harley-Davidson Street Glide EFI FLHX - - 2022-2023 Harley-Davidson FLTRKSE CVO Road Glide Limited - - 2022-2023 Harley-Davidson FLHXST Street Glide ST - - 2022 Harley-Davidson FLTRXST Road Glide ST - - 2020-2024 Harley-Davidson FLTRK Road Glide Limited - - 2019-2022 Harley-Davidson FLHT Electra Glide Standard - - 2017-2025 Harley-Davidson FLHXSE CVO Street Glide - - 2017-2025 Harley-Davidson Electra Glide Police FLHTPI - - 2017-2025 Harley-Davidson FLHRXS Road King Special - - 2017-2025 Harley-Davidson FLHX Street Glide - - 2017-2024 Harley-Davidson FLHTK Ultra Limited - - 2017-2023 Harley-Davidson FLHXS Street Glide Special - - 2017-2022 Harley-Davidson FLHR Road King - - 2017-2021 Harley-Davidson FLHTKSE CVO Limited - - 2017-2019 Harley-Davidson FLHTKL Ultra Limited Low - - 2017-2019 Harley-Davidson FLHTCU Electra Glide Ultra Classic - - 2017-2019 Harley-Davidson FLTRU Road Glide Ultra - - Fitment Disclosure This quick reference fitment information is provided to direct you to our catalog information and the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.