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Important – Off-Road Use Only: This exhaust is supplied for off-road / closed-course use only and is not approved for use on public roads unless clearly stated otherwise.
It is the customer’s responsibility to ensure the product is suitable and compliant for their intended use, including any applicable UK/EU noise and emissions requirements and any vehicle type-approval requirements.
Please note: Some images may be for illustrative purposes only.
-
Important – Off-Road Use Only: This exhaust is supplied for off-road / closed-course use only and is not approved for use on public roads unless clearly stated otherwise.
It is the customer’s responsibility to ensure the product is suitable and compliant for their intended use, including any applicable UK/EU noise and emissions requirements and any vehicle type-approval requirements.
Please note: Some images may be for illustrative purposes only.
Product description
The FMF Factory 4.1 RCT Stainless Steel Exhaust System For Honda CRF450R 2021-2025 is part of the latest collection from FMF.
Features:
- RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output
- Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire range of power
- FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage
- Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws
- Meets AMA and FIM sound requirements
- QuietCore 94 dB insert included
- Made in the U.S.A.
Specifications:
- Design/Configuration: Single Canister
- End Cap Color/Finish: Carbon Fiber
- Material: Aluminum| Carbon Fiber| Stainless Steel
- Model: Factory 4.1 RCT
- Muffler Color/Finish: Natural
- Muffler Material: Aluminum
- Pipe Material: Stainless Steel
- Product Name: Exhaust System
- Style: MegaBomb
- Type: Full System
- Units: Each
To fit:
- HONDA CRF 450 RX 2022 American Models
- HONDA CRF 450 RX 2023 American Models
- HONDA CRF 450 RX 2024 American Models
- HONDA CRF 450 RX 2025 American Models
- HONDA CRF 450 R 2021 All Models
- HONDA CRF 450 R 2022 All Models
- HONDA CRF 450 R 2023 50th Anniversary All Models
- HONDA CRF 450 R 2023 All Models
- HONDA CRF 450 R 2024 All Models
- HONDA CRF 450 R 2025 All Models
- HONDA CRF 450 RX 2021 American Models
Manufacturer part number: 041604
View all FMF. View all Parts and spares.
Contents
Your package will include the following:
- 1 X FMF Factory 4.1 RCT Stainless Steel Exhaust System For Honda CRF450R 2021-2025
To fit:
- HONDA CRF 450 RX 2021 American Models
- HONDA CRF 450 RX 2022 American Models
- HONDA CRF 450 RX 2023 American Models
- HONDA CRF 450 RX 2024 American Models
- HONDA CRF 450 RX 2025 American Models
- HONDA CRF 450 R 2021 All Models
- HONDA CRF 450 R 2022 All Models
- HONDA CRF 450 R 2023 50th Anniversary All Models
- HONDA CRF 450 R 2023 All Models
- HONDA CRF 450 R 2024 All Models
- HONDA CRF 450 R 2025 All Models

GhostBikes are now stocking a full range of FMF pipes for a wide range of off road 2 stroke and 4 stroke makes and models! Get more power from your bike with an FMF exhaust system!
FMF is one of the world's leading manufacturers of aftermarket motorcycle exhaust systems. Their exhausts are designed to increase the performance of your bike while also giving it a more aggressive sound. FMF offers a wide range of exhaust options, including full systems, slip-on mufflers, and head pipes, for various makes and models of off-road and motocross motorcycles.
Product description
The FMF Factory 4.1 RCT Stainless Steel Exhaust System For Honda CRF450R 2021-2025 is part of the latest collection from FMF.
Features:
- RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power output
- Internal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the entire range of power
- FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage
- Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws
- Meets AMA and FIM sound requirements
- QuietCore 94 dB insert included
- Made in the U.S.A.
Specifications:
- Design/Configuration: Single Canister
- End Cap Color/Finish: Carbon Fiber
- Material: Aluminum| Carbon Fiber| Stainless Steel
- Model: Factory 4.1 RCT
- Muffler Color/Finish: Natural
- Muffler Material: Aluminum
- Pipe Material: Stainless Steel
- Product Name: Exhaust System
- Style: MegaBomb
- Type: Full System
- Units: Each
To fit:
- HONDA CRF 450 RX 2022 American Models
- HONDA CRF 450 RX 2023 American Models
- HONDA CRF 450 RX 2024 American Models
- HONDA CRF 450 RX 2025 American Models
- HONDA CRF 450 R 2021 All Models
- HONDA CRF 450 R 2022 All Models
- HONDA CRF 450 R 2023 50th Anniversary All Models
- HONDA CRF 450 R 2023 All Models
- HONDA CRF 450 R 2024 All Models
- HONDA CRF 450 R 2025 All Models
- HONDA CRF 450 RX 2021 American Models
Manufacturer part number: 041604
View all FMF. View all Parts and spares.
Contents
Your package will include the following:
- 1 X FMF Factory 4.1 RCT Stainless Steel Exhaust System For Honda CRF450R 2021-2025
To fit:
- HONDA CRF 450 RX 2021 American Models
- HONDA CRF 450 RX 2022 American Models
- HONDA CRF 450 RX 2023 American Models
- HONDA CRF 450 RX 2024 American Models
- HONDA CRF 450 RX 2025 American Models
- HONDA CRF 450 R 2021 All Models
- HONDA CRF 450 R 2022 All Models
- HONDA CRF 450 R 2023 50th Anniversary All Models
- HONDA CRF 450 R 2023 All Models
- HONDA CRF 450 R 2024 All Models
- HONDA CRF 450 R 2025 All Models

GhostBikes are now stocking a full range of FMF pipes for a wide range of off road 2 stroke and 4 stroke makes and models! Get more power from your bike with an FMF exhaust system!
FMF is one of the world's leading manufacturers of aftermarket motorcycle exhaust systems. Their exhausts are designed to increase the performance of your bike while also giving it a more aggressive sound. FMF offers a wide range of exhaust options, including full systems, slip-on mufflers, and head pipes, for various makes and models of off-road and motocross motorcycles.






























