FMF 041291 Factory 4.1 Slip-On Muffler – 2007–2025 Honda CRF150R - Anodized Titanium

Experience championship-level performance with the FMF 041291 Factory 4.1 Slip-On Muffler, engineered for the 2007–2025 Honda CRF150R. Built with lightweight anodized titanium, this high-performance FMF Factory 4.1 Muffler delivers superior horsepower across the entire RPM range, offering the perfect blend of power, control, and durability.

The FMF Factory 4.1 Slip-On Exhaust features advanced Factory Forward Engineering, which centralizes mass for improved handling and balance on the track. Riders can further customize performance with optional tuning inserts and spark arrestor modules. Developed from FMF’s race-proven technology, the Factory 4.1 provides maximum throttle response, crisp power delivery, and an aggressive factory sound that sets your CRF150R apart.

Fitment

Honda CRF150R: 2007–2025

Top Features

• Lightweight anodized titanium construction for superior strength and heat resistance
• Horsepower improved throughout the RPM range for total power gains
• Factory Forward Engineering centralizes mass to enhance handling
• Customizable tuning options with performance inserts and spark arrestor module
• Race-developed design built from FMF’s championship-winning technology

FAQs

Q: Does the FMF Factory 4.1 Slip-On improve performance over stock?
A: Yes, it increases horsepower and torque throughout the powerband while reducing weight.

Q: Can I add a spark arrestor to this muffler?
A: Absolutely. The Factory 4.1 is compatible with FMF’s spark arrestor module for off-road compliance.

Q: Is the FMF Factory 4.1 Slip-On easy to install on my CRF150R?
A: Yes, it’s a direct bolt-on fit for all 2007–2025 Honda CRF150R models.

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