FMF 25099 Stealth Exhaust Muffler Silencer Tail Pipe Slip

( Brand: Fmf ), ( Manufacturer Part Number: 25099 ), ( Part Type: Pipe Slip Exhaust Muffler Silencer )

Review FMF Ktm Stealth Exhaust Muffler Silencer Tail Pipe Slip On fits XC 300 2004–2010

The **FMF 25099 OEM Replacement Exhaust Muffler, Silencer, and Tail Pipe Slip** is a meticulously engineered aftermarket component designed to restore factory precision and performance to the **2004 2010 KTM 300 XC-WTC "Stealth"** adventure bike. Crafted from high-grade **409 stainless steel**, this exhaust slip-on system is built to withstand the demanding conditions of off-road riding, from rugged trails to dusty backroads, while delivering a near-identical fit and finish to the original equipment. The muffler features a **precision-welded construction** with a **smooth, tapered design** that optimizes exhaust flow, reducing backpressure to enhance throttle response and engine efficiency. Its **OEM-style mounting points** ensure a secure, vibration-dampened attachment to the bike s exhaust system, eliminating rattles and maintaining structural integrity under heavy use. The **slip-on tailpipe** is designed to seamlessly integrate with the existing exhaust headers, requiring minimal modification just a simple slip-over installation that preserves the bike s stock exhaust routing. This system is ideal for riders seeking a **quiet, compliant exhaust solution** without sacrificing performance, making it a perfect choice for those who prioritize legality, reliability, and a subtle, natural exhaust note. Whether you're tackling technical trails or cruising on paved roads, the FMF 25099 exhaust slip delivers a **clean, functional upgrade** that keeps your KTM 300 XC-WTC running smoothly while maintaining its original character.

### **Pros and Cons of buying a FMF 25099 2004-2010 KTM 300 XC Stealth Exhaust Muffler/Silencer/Tail Pipe Slip**

1. **Improved Sound Quality** The FMF exhaust system is designed to enhance the KTM 300 XC s exhaust note, providing a more aggressive and sportier tone while maintaining a balanced sound that still complies with most off-road regulations (depending on local laws).

2. **Better Flow and Performance** The slip-on design and optimized internal baffling improve exhaust flow, which can contribute to slight power gains, especially in higher RPM ranges. This is particularly noticeable in trail riding where the engine is often pushed harder.

3. **Durability and Quality** FMF is a well-regarded brand in the aftermarket exhaust industry, known for using high-quality materials like stainless steel and precision manufacturing. The slip-on design is also less prone to damage from rocks and debris compared to full-system exhausts.

4. **Easy Installation** As a slip-on muffler, it requires minimal modification to the stock exhaust system. No welding or major disassembly is needed, making it a straightforward DIY project for most riders.

5. **Aesthetic Appeal** The FMF exhaust has a sleek, aggressive look that enhances the KTM s sporty appearance, which can be appealing for riders who prioritize styling.

6. **Compatibility** Specifically designed for the 2004-2010 KTM 300 XC, ensuring a proper fit without the need for adapters or modifications.

7. **Maintenance-Friendly** The slip-on design allows for easier access to the stock muffler if further modifications are needed in the future.

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1. **Sound Compliance Issues** While the FMF exhaust is quieter than many aggressive aftermarket options, it may still exceed legal decibel limits in some regions, particularly if local laws are strict. Always check local regulations before purchasing.

2. **Minimal Power Gains** While there may be slight performance improvements, the gains are modest compared to full exhaust systems or other high-flow modifications. For serious performance tuning, this may not be enough.

3. **Cost Relative to Benefits** The FMF exhaust is priced higher than basic slip-ons or stock mufflers. If you re primarily looking for a subtle upgrade rather than a dramatic change, the cost may not justify the benefits.

4. **Potential for Backfires** Like many aftermarket exhausts, the FMF system can be more prone to backfires, especially if the engine is not properly tuned or if fuel quality is inconsistent.

5. **Limited Customization** Unlike full exhaust systems, you cannot easily swap out components (e.g., different baffles or tips) to further tailor the sound or performance.

6. **Installation Challenges for Beginners** While easier than a full exhaust swap, slip-on mufflers still require careful alignment and sealing to prevent leaks. Poor installation can lead to noise or performance issues.

7. **Weight Consideration** The FMF exhaust is slightly heavier than the stock muffler, which may not significantly impact handling but could be a minor drawback for riders who prioritize lightweight components.

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The FMF 25099 slip-on muffler for the 2004-2010 KTM 300 XC is a solid mid-range upgrade that offers a balance between improved sound, minor performance benefits, and ease of installation. It is best suited for riders who want a noticeable but not extreme change in exhaust tone without committing to a full exhaust system. However, those in regions with strict noise laws should verify compliance before purchasing. For riders who prioritize maximum performance or aesthetic customization, a full exhaust system or other modifications may be more worthwhile.

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- **Buy if:** You want a straightforward, high-quality exhaust upgrade that enhances the KTM 300 XC s sound and performance slightly without major modifications. You re in a region where the sound is legal, or you re willing to check local regulations.

- **Skip if:** You re looking for dramatic power gains, extreme sound modifications, or a full aesthetic overhaul. Alternatively, if you re on a tight budget and the stock exhaust meets your needs.

- **Consider alternatives:** If you want more aggressive sound or better performance, explore full exhaust systems (e.g., FMF or other brands) or consult a tuner to optimize the setup. For a quieter option, a stock or lightly modified muffler may suffice.

Ultimately, the FMF exhaust is a practical choice for riders seeking a noticeable but not extreme upgrade with minimal hassle.

Details:

FMF Turbine Q Stealth Exhaust Muffler Assembly. Couple dents seen on the sides. Fitment Guarantee. These parts were removed from a 2006 KTM 250 XCW If your vehicle is different than this, be sure to verify fitment.

Packing appears to be intact, exhaust has not been disassembled verify condition of internals. No cracks, breaks or repairs seen. Unit is in good working condition.

part #: 25099 prices

• $39.99-$149.99

specifications cyclemufflermo:

• for models: Xc, 300
• for makes: Ktm
• for years: 2004-2010
• brand: Fmf
• mpn: 25099
• part type: Pipe Slip Exhaust Muffler Silencer

offer cyclemufflermo:

• sold: 0
• started: April 21, 2026
• availability: In Stock
• options: Ship-to-home
• quantity: 1

payments cyclemufflermo:

• credit card: Discover
• wallet: Paypal
• other

seller cyclemufflermo:

• # reviews: 5177
• rating: 99.9%
• city: Puyallup, Washington

general cyclemufflermo:

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

returns cyclemufflermo:

• paid by: Buyer
• policy: Returns Accepted
• time: 30 Days

shipping cyclemufflermo:

• service: FedEx Ground / FedEx Home Delivery
• type: Fixed
• cost: $30.00
• transit: 3-8 Days
• class: Standard
• carrier: FedEx

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