FMF 842527 Exhaust 4/1 450R/ /works

( Brand: Fmf ), ( Manufacturer Part Number: 842527 ), ( Mounting Style: Slip-on ), ( Type: Muffler ), ( Machine Type: Off-road Motorcycle ), ( Features: Easy To Replace, 100 Accuracy Of Fit ), ( Material: Stainless Steel ), ( Country/region Of Manufacture: United States ), ( Finish: Polished, Chrome ), ( Placement On Vehicle: Exhaust )

Review FMF 4/1 Exhaust 450r/ /works Edition fits 450R CRF RX 450 2017–2020

FMF Powercore 4.1 Silencer System for Honda CRF450R/RX (2017-2020)

The FMF Powercore 4.1 Silencer System, model number FMF 842527, is a high-performance exhaust system engineered specifically for the Honda CRF450R and CRF450RX motorcycles manufactured between 2017 and 2020. This exhaust system is a testament to FMF's commitment to innovation, power, and durability.

The Powercore 4.1 Silencer System is designed to deliver unmatched power and torque, making it an ideal choice for racers and enthusiasts who demand the best from their machines. The system features a large 4.1-inch main silencer, which, when combined with the Powercore internal core design, ensures optimal gas flow and exceptional power gains. The result is a bike that sounds as good as it performs, with a deep, aggressive tone that's sure to turn heads.

The system's construction is equally impressive. It is crafted from high-quality materials, including a titanium main can and carbon fiber end cap, to ensure lightweight durability. The silencer's compact design also enhances ground clearance, reducing the risk of damage during off-road riding.

The Powercore 4.1 Silencer System is easy to install, thanks to its bolt-on design. It is also CARB-approved, making it legal for use in California and other states with similar emissions regulations.

In summary, the FMF Powercore 4.1 Silencer System is a top-tier exhaust option for the Honda CRF450R/RX (2017-2020). It offers outstanding performance gains, a unique sound, and durable construction, making it an excellent choice for riders who want to take their bike's performance to the next level.

The FMF MX 450 Exhaust (part number: FMF 842527) for CRF450R/RX (2017-2020) is a high-performance aftermarket exhaust system. Here are some pros and cons to consider:

1. Improved Power: The exhaust system is designed to increase horsepower and torque, providing better performance and acceleration.

2. Lightweight: This exhaust system is significantly lighter than the stock exhaust, reducing overall weight and improving bike handling.

3. Durable Construction: FMF uses high-quality materials and precision manufacturing processes to ensure durability and long-lasting performance.

4. Better Exhaust Flow: The FMF exhaust system is designed to improve exhaust flow, reducing backpressure and allowing the engine to breathe more efficiently.

5. Enhanced Sound: The exhaust system offers a louder, more aggressive exhaust note, which many riders find appealing.

1. Cost: Aftermarket exhaust systems like the FMF MX 450 Exhaust are typically more expensive than stock exhaust systems.

2. Loudness: The increased loudness may not be suitable for all riding environments, such as residential areas or early morning rides.

3. Fitting Issues: There might be some minor fitting issues when installing the exhaust system, which may require additional parts or modifications.

4. No OEM Warranty: Installing aftermarket parts like this exhaust system may void the original manufacturer's warranty on your bike.

In conclusion, the FMF MX 450 Exhaust (part number: FMF 842527) for CRF450R/RX (2017-2020) offers significant performance improvements, but it also comes with a higher cost and potential fitting issues. If you're a serious off-road rider seeking increased power and better performance, this exhaust system could be a worthwhile investment. However, if you prioritize a quieter ride, or if you're concerned about fitting issues or the warranty, you might want to consider other options. Always ensure that any modifications comply with local laws and safety regulations.

Details:

The FMF 4:1 450 exhaust is a high-quality muffler designed for off-road motorcycles such as the CRF 450R, RX, and Works Edition model's from 2017 to 2020. Made in the USA with stainless steel, this slip-on exhaust features a chrome and polished finish for sleek look.

part #: 842527 prices

• $359.00-$449.99

specifications cyclemufflermo:

• for models: 450r, Crf, Rx, 450
• for years: 2017-2020
• brand: Fmf
• mpn: 842527
• mounting style: Slip-on
• type: Muffler
• machine type: Off-road Motorcycle
• features: Easy To Replace, 100 Accuracy Of Fit
• material: Stainless Steel
• country/region of manufacture: United States
• finish: Polished, Chrome
• placement on vehicle: Exhaust

returns cyclemufflermo:

• policy: No Returns

seller cyclemufflermo:

• rating: 100.0%
• # reviews: 16
• city: Salinas, California

shipping cyclemufflermo:

• type: Calculated
• carrier: USPS
• transit: 4-9 Days
• class: Standard
• service: USPS Ground Advantage
• cost: $66.93

general cyclemufflermo:

• Motorcycle Scooter Parts Accessories > Exhaust Emission Systems > Silencers, Mufflers Baffles
• condition: Used

payments cyclemufflermo:

• credit card: Visa
• wallet: Apple-pay
• other

offer cyclemufflermo:

• quantity: 1
• best offers: True
• started: July 22, 2025
• sold: 0
• options: Ship-to-home
• availability: In Stock

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