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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 Yamaha YZF450 2020-2022 is part of the latest collection from FMF.
Features:
- The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology⢠both internally and externally
- Shorter overall length that is less susceptible to crash damage and complementary to FMF's Factory Forward Engineering - moving the muffler closer to the motor to centralize mass
- The Factory 4.1 RCT is constructed from only aerospace grade materials that meet FMF's exacting specifications and is manufactured 100% at their Southern California factory
- Massive Power gains throughout the RPM range.
- Huge weight savings
- New RTS (Rapid Tuning System)
- Includes MegaBomb header
- Includes spark arrestor screen insert
Specifications:
- End Cap Material: Carbon Fiber
- Material: Aluminum| Stainless Steel
- Model: Factory 4.1 RCT
- Muffler Color/Finish: Raw
- Muffler Material: Aluminum
- Pipe Material: Stainless Steel
- Product Name: Exhaust System
- Type: Full System
- Units: Each
To fit:
- YAMAHA YZ 450 FX 2022 American Models
- YAMAHA YZ 450 FX 2023 American Models
- YAMAHA YZ 450 F 2020 American Models
- YAMAHA YZ 450 F 2020 European Models
- YAMAHA YZ 450 F 2021 All Models
- YAMAHA YZ 450 F 2022 All Models
- YAMAHA YZ 450 FX 2021 American Models
Manufacturer part number: 044460
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 Yamaha YZF450 2020-2022
To fit:
- YAMAHA YZ 450 FX 2021 American Models
- YAMAHA YZ 450 FX 2022 American Models
- YAMAHA YZ 450 FX 2023 American Models
- YAMAHA YZ 450 F 2020 American Models
- YAMAHA YZ 450 F 2020 European Models
- YAMAHA YZ 450 F 2021 All Models
- YAMAHA YZ 450 F 2022 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 Yamaha YZF450 2020-2022 is part of the latest collection from FMF.
Features:
- The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology⢠both internally and externally
- Shorter overall length that is less susceptible to crash damage and complementary to FMF's Factory Forward Engineering - moving the muffler closer to the motor to centralize mass
- The Factory 4.1 RCT is constructed from only aerospace grade materials that meet FMF's exacting specifications and is manufactured 100% at their Southern California factory
- Massive Power gains throughout the RPM range.
- Huge weight savings
- New RTS (Rapid Tuning System)
- Includes MegaBomb header
- Includes spark arrestor screen insert
Specifications:
- End Cap Material: Carbon Fiber
- Material: Aluminum| Stainless Steel
- Model: Factory 4.1 RCT
- Muffler Color/Finish: Raw
- Muffler Material: Aluminum
- Pipe Material: Stainless Steel
- Product Name: Exhaust System
- Type: Full System
- Units: Each
To fit:
- YAMAHA YZ 450 FX 2022 American Models
- YAMAHA YZ 450 FX 2023 American Models
- YAMAHA YZ 450 F 2020 American Models
- YAMAHA YZ 450 F 2020 European Models
- YAMAHA YZ 450 F 2021 All Models
- YAMAHA YZ 450 F 2022 All Models
- YAMAHA YZ 450 FX 2021 American Models
Manufacturer part number: 044460
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 Yamaha YZF450 2020-2022
To fit:
- YAMAHA YZ 450 FX 2021 American Models
- YAMAHA YZ 450 FX 2022 American Models
- YAMAHA YZ 450 FX 2023 American Models
- YAMAHA YZ 450 F 2020 American Models
- YAMAHA YZ 450 F 2020 European Models
- YAMAHA YZ 450 F 2021 All Models
- YAMAHA YZ 450 F 2022 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.
































