FMF Racing Factory 4.1 Aluminum RCT Slip-On Muffler - Fits 2025 Honda CRF250R/RX

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SKU: FMF041620
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Sale price$944.99 Regular price$1,049.99
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About FMF Racing

FMF Racing engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full FMF Racing lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Unleash Peak Power: FMF Racing Factory 4.1 Aluminum RCT Slip-On Muffler

Transform your 2025 Honda CRF250R or CRF250RX into a championship contender with the FMF Racing Factory 4.1 Aluminum RCT Slip-On Muffler. Engineered for the competitive edge, this exhaust system delivers significant performance gains, weight reduction, and a signature FMF sound that commands attention on the track. It's the ultimate upgrade for riders demanding the best from their Honda.

Race-Proven Technology & Premium Construction

  • Factory 4.1 RCT Design: Incorporates FMF's advanced Resonance Chamber Technology (RCT) for optimized exhaust flow, resulting in a broader, more usable powerband and enhanced throttle response across the RPM range.
  • Significant Power Gains: Experience noticeable increases in horsepower and torque, giving you the advantage out of corners and on straights. Expect a sharp, aggressive race-tuned sound profile.
  • Lightweight Aluminum Canister: Constructed from high-grade aluminum for maximum durability and substantial weight savings over stock, improving handling and agility.
  • Carbon Fiber End Cap: Features a stylish and robust carbon fiber end cap, adding a touch of factory aesthetics while providing extra protection.
  • Stainless Steel Mid-Pipe: The included stainless steel mid-pipe (SS MGBMB HDR) ensures robust connection and corrosion resistance, designed for longevity in harsh racing conditions.

The FMF Advantage for Your Honda CRF250R/RX

The FMF Factory 4.1 RCT Slip-On Muffler is more than just an exhaust; it's a performance statement. Developed through years of professional racing, this system provides the reliability and power output necessary to dominate. Easy to install and meticulously crafted, it's the perfect way to unlock your 2025 Honda CRF250R or CRF250RX's full potential. Trust FMF Racing for championship-winning performance.

Product Details

Product Description
Part Numbers
Sizing & Fit

About FMF Racing

FMF Racing engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full FMF Racing lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Unleash Peak Power: FMF Racing Factory 4.1 Aluminum RCT Slip-On Muffler

Transform your 2025 Honda CRF250R or CRF250RX into a championship contender with the FMF Racing Factory 4.1 Aluminum RCT Slip-On Muffler. Engineered for the competitive edge, this exhaust system delivers significant performance gains, weight reduction, and a signature FMF sound that commands attention on the track. It's the ultimate upgrade for riders demanding the best from their Honda.

Race-Proven Technology & Premium Construction

  • Factory 4.1 RCT Design: Incorporates FMF's advanced Resonance Chamber Technology (RCT) for optimized exhaust flow, resulting in a broader, more usable powerband and enhanced throttle response across the RPM range.
  • Significant Power Gains: Experience noticeable increases in horsepower and torque, giving you the advantage out of corners and on straights. Expect a sharp, aggressive race-tuned sound profile.
  • Lightweight Aluminum Canister: Constructed from high-grade aluminum for maximum durability and substantial weight savings over stock, improving handling and agility.
  • Carbon Fiber End Cap: Features a stylish and robust carbon fiber end cap, adding a touch of factory aesthetics while providing extra protection.
  • Stainless Steel Mid-Pipe: The included stainless steel mid-pipe (SS MGBMB HDR) ensures robust connection and corrosion resistance, designed for longevity in harsh racing conditions.

The FMF Advantage for Your Honda CRF250R/RX

The FMF Factory 4.1 RCT Slip-On Muffler is more than just an exhaust; it's a performance statement. Developed through years of professional racing, this system provides the reliability and power output necessary to dominate. Easy to install and meticulously crafted, it's the perfect way to unlock your 2025 Honda CRF250R or CRF250RX's full potential. Trust FMF Racing for championship-winning performance.

Product Details

Product Description

About FMF Racing

FMF Racing engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full FMF Racing lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Unleash Peak Power: FMF Racing Factory 4.1 Aluminum RCT Slip-On Muffler

Transform your 2025 Honda CRF250R or CRF250RX into a championship contender with the FMF Racing Factory 4.1 Aluminum RCT Slip-On Muffler. Engineered for the competitive edge, this exhaust system delivers significant performance gains, weight reduction, and a signature FMF sound that commands attention on the track. It's the ultimate upgrade for riders demanding the best from their Honda.

Race-Proven Technology & Premium Construction

  • Factory 4.1 RCT Design: Incorporates FMF's advanced Resonance Chamber Technology (RCT) for optimized exhaust flow, resulting in a broader, more usable powerband and enhanced throttle response across the RPM range.
  • Significant Power Gains: Experience noticeable increases in horsepower and torque, giving you the advantage out of corners and on straights. Expect a sharp, aggressive race-tuned sound profile.
  • Lightweight Aluminum Canister: Constructed from high-grade aluminum for maximum durability and substantial weight savings over stock, improving handling and agility.
  • Carbon Fiber End Cap: Features a stylish and robust carbon fiber end cap, adding a touch of factory aesthetics while providing extra protection.
  • Stainless Steel Mid-Pipe: The included stainless steel mid-pipe (SS MGBMB HDR) ensures robust connection and corrosion resistance, designed for longevity in harsh racing conditions.

The FMF Advantage for Your Honda CRF250R/RX

The FMF Factory 4.1 RCT Slip-On Muffler is more than just an exhaust; it's a performance statement. Developed through years of professional racing, this system provides the reliability and power output necessary to dominate. Easy to install and meticulously crafted, it's the perfect way to unlock your 2025 Honda CRF250R or CRF250RX's full potential. Trust FMF Racing for championship-winning performance.

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