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Upgrade your touring motorcycle with the Cobra 6451RB Powrflo 2-into-1 exhaust system, designed for select Harley-Davidson FLH and FLT models from 2017 and 2018. This black exhaust system features a larger 2.5-inch collector header that helps improve power and torque, particularly when paired with mild-performance camshafts. It is engineered for enhanced street performance and is not intended for high-output monster motors.
The 4.5-inch muffler body produces a deep, throaty exhaust note through its sealed pillow of sound-absorbing material. A new El Diablo-style billet tip provides a distinctive finished appearance, while 222-degree heat shields and Cobra’s collector heat shield help protect surrounding components and improve the overall installation appearance. The muffler construction is designed to resist discoloration, and Cobra guarantees that the system will not turn blue for the life of the product when properly cared for.
The Cobra 6451RB Powrflo exhaust system fits the 2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic, FLHTCUTG Tri Glide Ultra Classic, FLHTK Electra Glide Ultra Limited, FLHX Street Glide, FLHXSE CVO Street Glide, and FLHRXS Road King Special. It also fits the 2018 FLHR Road King, FLHRXS Road King Special, FLHX Street Glide, and FLHXS Street Glide Special. This system is made in the USA and backed by Cobra’s limited lifetime warranty. Manufacturer part number: 6451RB. Vendor part number: 6451RB.
Features:
- Application: Cobra Powrflo 2-into-1 exhaust system designed for select Harley-Davidson FLH and FLT touring motorcycles
- Performance: 2.5-inch collector header helps improve power and torque with mild-performance camshafts
- Sound: 4.5-inch muffler body delivers a deep, throaty exhaust tone using sealed sound-absorbing material
- Finish: Black muffler construction is designed to resist discoloration and is guaranteed not to turn blue for the life of the product with proper care
- Tip: El Diablo-style billet tip adds a distinctive, high-quality finish
- Heat Protection: 222-degree heat shields and a collector heat shield help protect nearby components
- Fitment: Fits select 2017 and 2018 Harley-Davidson FLH and FLT models, including Electra Glide, Tri Glide, Street Glide, Road King, and Road King Special applications
- Warranty: Limited lifetime warranty
- Origin: Made in the USA
- Part Number: Cobra manufacturer and vendor part number 6451RB
Fitment:
2017 Harley Davidson FLHR Road King
2017 Harley Davidson FLHRC Road King Classic
2017 Harley Davidson FLHRXS Road King Special
2017 Harley Davidson FLHTCU Electra Glide Ultra Classic
2017 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2017 Harley Davidson FLHTK Electra Glide Ultra Limited
2017 Harley Davidson FLHTKL Electra Glide Ultra Limited Low
2017 Harley Davidson FLHTKSE CVO Limited
2017 Harley Davidson FLHX Street Glide
2017 Harley Davidson FLHXS Street Glide Special
2017 Harley Davidson FLHXSE CVO Street Glide
2017 Harley Davidson FLTR Road Glide
2017 Harley Davidson FLTRU Road Glide Ultra
2017 Harley Davidson FLTRXS Road Glide Special
2018 Harley Davidson FLHC Softail Heritage Classic
2018 Harley Davidson FLHCS Softail Heritage Classic 114
2018 Harley Davidson FLHR Road King
2018 Harley Davidson FLHRXS Road King Special
2018 Harley Davidson FLHTCU Electra Glide Ultra Classic
2018 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2018 Harley Davidson FLHTK Electra Glide Ultra Limited
2018 Harley Davidson FLHTKL Electra Glide Ultra Limited Low
2018 Harley Davidson FLHTKSE CVO Limited
2018 Harley Davidson FLHX Street Glide
2018 Harley Davidson FLHXS Street Glide Special
2018 Harley Davidson FLHXSE CVO Street Glide
2018 Harley Davidson FLTR Road Glide
2018 Harley Davidson FLTRU Road Glide Ultra
2018 Harley Davidson FLTRXS Road Glide Special
2018 Harley Davidson FLTRXSE CVO Road Glide
2019 Harley Davidson FLHC Softail Heritage Classic
2019 Harley Davidson FLHCS Softail Heritage Classic 114
2019 Harley Davidson FLHR Road King
2019 Harley Davidson FLHRXS Road King Special
2019 Harley Davidson FLHT Electra Glide
2019 Harley Davidson FLHTCU Electra Glide Ultra Classic
2019 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2019 Harley Davidson FLHTK Electra Glide Ultra Limited
2019 Harley Davidson FLHTKL Electra Glide Ultra Limited Low
2019 Harley Davidson FLHTKSE CVO Limited
2019 Harley Davidson FLHX Street Glide
2019 Harley Davidson FLHXS Street Glide Special
2019 Harley Davidson FLHXSE CVO Street Glide
2019 Harley Davidson FLTR Road Glide
2019 Harley Davidson FLTRU Road Glide Ultra
2019 Harley Davidson FLTRXS Road Glide Special
2019 Harley Davidson FLTRXSE CVO Road Glide
2020 Harley Davidson FLHC Softail Heritage Classic
2020 Harley Davidson FLHCS Softail Heritage Classic 114
2020 Harley Davidson FLHR Road King
2020 Harley Davidson FLHRXS Road King Special
2020 Harley Davidson FLHT Electra Glide
2020 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2020 Harley Davidson FLHTCUTGSE CVO Tri Glide
2020 Harley Davidson FLHTK Electra Glide Ultra Limited
2020 Harley Davidson FLHTKSE CVO Limited
2020 Harley Davidson FLHX Street Glide
2020 Harley Davidson FLHXS Street Glide Special
2020 Harley Davidson FLHXSE CVO Street Glide
2020 Harley Davidson FLTR Road Glide
2020 Harley Davidson FLTRK Road Glide Limited
2020 Harley Davidson FLTRX Road Glide Custom
2020 Harley Davidson FLTRXS Road Glide Special
2020 Harley Davidson FLTRXSE CVO Road Glide
2021 Harley Davidson FLH Electra Glide
2021 Harley Davidson FLHC Softail Heritage Classic
2021 Harley Davidson FLHCS Softail Heritage Classic 114
2021 Harley Davidson FLHR Road King
2021 Harley Davidson FLHRXS Road King Special
2021 Harley Davidson FLHT Electra Glide
2021 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2021 Harley Davidson FLHTCUTGSE CVO Tri Glide
2021 Harley Davidson FLHTK Electra Glide Ultra Limited
2021 Harley Davidson FLHTKSE CVO Limited
2021 Harley Davidson FLHX Street Glide
2021 Harley Davidson FLHXS Street Glide Special
2021 Harley Davidson FLHXSE CVO Street Glide
2021 Harley Davidson FLTRK Road Glide Limited
2021 Harley Davidson FLTRX Road Glide Custom
2021 Harley Davidson FLTRXS Road Glide Special
2021 Harley Davidson FLTRXSE CVO Road Glide
2022 Harley Davidson FLHCS Softail Heritage Classic 114
2022 Harley Davidson FLHR Road King
2022 Harley Davidson FLHRXS Road King Special
2022 Harley Davidson FLHT Electra Glide
2022 Harley Davidson FLHTCUTG Tri Glide Ultra Classic
2022 Harley Davidson FLHTCUTGSE CVO Tri Glide
2022 Harley Davidson FLHTK Electra Glide Ultra Limited
2022 Harley Davidson FLHX Street Glide
2022 Harley Davidson FLHXS Street Glide Special
2022 Harley Davidson FLHXSE CVO Street Glide
2022 Harley Davidson FLHXST Street Glide ST
2022 Harley Davidson FLTRK Road Glide Limited
2022 Harley Davidson FLTRKSE CVO Road Glide Limited
2022 Harley Davidson FLTRX Road Glide Custom
2022 Harley Davidson FLTRXS Road Glide Special
2022 Harley Davidson FLTRXSE CVO Road Glide
2022 Harley Davidson FLTRXST Road Glide ST
2023 Harley Davidson FLHFB Electra Glide Highway King
2023 Harley Davidson FLHRXS Road King Special
2023 Harley Davidson FLHTK Electra Glide Ultra Limited
2023 Harley Davidson FLHX Street Glide
2023 Harley Davidson FLHXS Street Glide Special
2023 Harley Davidson FLHXSE CVO Street Glide
2023 Harley Davidson FLHXST Street Glide ST
2023 Harley Davidson FLTR Road Glide
2023 Harley Davidson FLTRK Road Glide Limited
2023 Harley Davidson FLTRKSE CVO Road Glide Limited
2023 Harley Davidson FLTRT Trike Road Glide 3
2023 Harley Davidson FLTRX Road Glide Custom
2023 Harley Davidson FLTRXS Road Glide Special
2023 Harley Davidson FLTRXSE CVO Road Glide
2023 Harley Davidson FLTRXST Road Glide ST
2024 Harley Davidson FLHRXS Road King Special
2024 Harley Davidson FLHTK Electra Glide Ultra Limited
2024 Harley Davidson FLHX Street Glide
2024 Harley Davidson FLHXSE CVO Street Glide
2024 Harley Davidson FLTRK Road Glide Limited
2024 Harley Davidson FLTRX Road Glide Custom
2024 Harley Davidson FLTRXSE CVO Road Glide
2024 Harley Davidson FLTRXSTSE CVO Road Glide ST
2025 Harley Davidson FLHXSE CVO Street Glide