AKRAPOVIC A490.05.981.00 Muffler Exhaust Slip A49005981000

( Brand: Akrapovic ), ( Manufacturer Part Number: A490.05.981.00 ), ( Type: Muffler ), ( Material: Titanium )

Review AKRAPOVIC Muffler Slip On Exhaust Ktm Exc Husqvarna fits 250 350 500

The **Akrapovi A490.05.981.00 Muffler Slip-On Exhaust** is a high-performance aftermarket exhaust system meticulously engineered to elevate the throttle response, power delivery, and overall driving experience of KTM and Husqvarna models ranging from the 250cc to the 500cc displacement classes. Designed with precision and built to exacting standards, this slip-on muffler is a direct replacement for the stock exhaust, ensuring a seamless integration that preserves the factory mounting points while dramatically enhancing performance. Crafted from high-grade stainless steel, the A490.05.981.00 features a robust, polished finish that not only resists corrosion and wear but also adds a sleek, aggressive aesthetic to the bike s appearance. The exhaust s internal design incorporates a carefully tuned slip-on configuration, which allows for a more efficient exhaust gas flow, reducing backpressure and enabling the engine to breathe more freely. This results in a noticeable improvement in mid-range torque and top-end power, making the bike feel more responsive and agile, whether you're navigating tight corners or pushing hard on the straightaways. The muffler s sound profile is equally compelling, delivering a deep, throaty growl that is both exhilarating and distinctive, striking a perfect balance between aggression and refinement. Ideal for riders who demand both performance and style, the Akrapovi A490.05.981.00 is a premium choice for those looking to transform their KTM or Husqvarna into a more dynamic and exhilarating machine without compromising on durability or quality. Whether you're a track-focused enthusiast or a street rider seeking an edge, this exhaust system is a testament to Akrapovi s commitment to innovation and precision engineering.

### **Pros and Cons of buying a Akrapovi A490.05.981.00 Muffler Slip-On Exhaust for KTM/ Husqvarna 250/350/500cc Models**

#### **Overview**

The **Akrapovi A490.05.981.00** is a slip-on exhaust system designed for KTM and Husqvarna air/oil-cooled single-cylinder motorcycles (250cc, 350cc, and 500cc models). It is part of Akrapovi s **A490 series**, which is known for improving performance, sound, and aesthetics while maintaining compatibility with factory mounts.

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### **Pros**

1. **Performance Gains**

- **Increased Horsepower & Torque:** The slip-on design reduces backpressure, allowing the engine to breathe better, which can improve power output, especially in the mid-to-high RPM range. Users often report noticeable gains in acceleration and top-end speed.

- **Better Throttle Response:** The lighter weight and improved exhaust flow can make the bike feel more responsive, particularly in sportier riding scenarios.

- **Optimized Tuning Potential:** The exhaust works well with aftermarket tuning (e.g., remapping, upgraded carburetors, or fuel injection systems), making it a good choice if you plan to modify further.

2. **Sound & Tone**

- **Deeper, More Aggressive Sound:** Akrapovi exhausts are known for their distinctive, growling tone, which is louder and more pronounced than stock systems. This is particularly appealing for riders who enjoy a sportier or more aggressive exhaust note.

- **Better Mid-Range Projection:** The design emphasizes mid-range frequencies, giving the bike a more engaging exhaust sound during acceleration.

3. **Durability & Quality**

- **High-Quality Materials:** Akrapovi uses stainless steel and heat-resistant coatings, which are more durable than many aftermarket alternatives. The system is designed to handle the heat and stress of high-performance riding.

- **Long Lifespan:** With proper maintenance (e.g., regular cleaning of the muffler and heat shields), the exhaust can last for tens of thousands of miles, especially on well-maintained bikes.

4. **Compatibility & Fitment**

- **Direct Drop-In Fit:** The slip-on design means it can be installed without modifying the stock exhaust headers or mounting points, making it a straightforward upgrade.

- **Works with Stock & Aftermarket Parts:** Compatible with stock airboxes, carburetures, and even some aftermarket fuel injection systems (though tuning may be required for optimal performance).

- **Supports Both Air-Cooled & Liquid-Cooled Models:** While primarily designed for air-cooled KTM/Husqvarna singles, it also works on some liquid-cooled variants (e.g., KTM 500 SX-F with minor adjustments).

5. **Aesthetics**

- **Sporty, Aggressive Look:** The Akrapovi exhaust has a sleek, aggressive design that improves the bike s visual appeal, especially when paired with other performance parts.

- **Consistent Branding:** Akrapovi is a well-respected brand in the off-road and sportbike communities, so installing one adds to the bike s perceived value and customization.

6. **Ease of Installation**

- **Minimal Tools Required:** Unlike full exhaust systems, slip-ons are easier to install, often requiring only basic tools and no welding.

- **No Major Modifications Needed:** Since it slips over the stock exhaust, there s no need to remove or alter the headers or mounting brackets.

7. **Aftermarket Support**

- **Widely Available Parts:** Akrapovi offers replacement gaskets, heat shields, and other accessories, making maintenance easier.

- **Community & Tuning Resources:** The KTM/Husqvarna community has extensive knowledge about tuning with Akrapovi exhausts, including recommended carburetor upgrades and ECU settings.

---

### **Cons**

1. **Noise Levels**

- **Loud by Legal Standards:** The A490 series is significantly louder than stock exhausts, often exceeding legal noise limits in many regions (e.g., 90-100 dB(A) vs. stock s 85-90 dB(A)). Riders may need to install a **sound-deadening kit** or **mute** if local laws require it.

- **Potential for Complaints:** Neighbors or authorities may complain about the noise, especially in residential areas. Some riders report being pulled over or fined for excessive noise.

2. **Tuning Required for Optimal Performance**

- **May Need Remapping or Carb Adjustments:** While the exhaust itself improves flow, the engine may require tuning (e.g., ECU remapping or carburetor adjustments) to fully realize performance gains. Without tuning, you may not see significant power improvements.

- **Risk of Engine Damage if Mismatched:** If the exhaust is installed without adjusting fuel delivery (e.g., richer carburetor settings or remapping), it can lead to **lean running, overheating, or detonation** in high-RPM scenarios.

3. **Weight Considerations**

- **Heavier Than Some Aftermarket Options:** While still lighter than stock exhausts, some high-end aftermarket systems (e.g., custom titanium or lightweight steel exhausts) are even lighter. The A490 is sturdy but not the lightest slip-on available.

- **Heat Retention:** The stainless steel construction retains heat, which can affect rider comfort (especially on long rides) and may require additional heat shielding.

4. **Cost**

- **Premium Price:** Akrapovi exhausts are more expensive than basic aftermarket slip-ons (e.g., from lesser-known brands). The A490.05.981.00 typically costs **$800 $1,200 USD**, depending on the retailer and region.

- **Additional Costs:** Installation may require professional help if you re unsure about tuning or gasket replacement, adding to the total expense.

5. **Potential for Backfires**

- **Higher Risk of Backfires:** The improved exhaust flow can sometimes lead to **backfires** if the carburetor or ignition timing is not properly adjusted. This is more common on carbureted models (e.g., KTM 250/350 SXF) than fuel-injected ones.

- **Exhaust Valve Damage Risk:** Severe backfires can damage the exhaust s internal components over time, though this is rare with proper tuning.

6. **Limited Customization**

- **Fixed Sound Profile:** Unlike some aftermarket exhausts that offer multiple muffler sizes or tone options, the A490 has a specific sound signature. If you prefer a different tone (e.g., deeper bass or a more aggressive growl), you may need to explore other brands.

- **No Adjustable Mufflers:** The system does not come with adjustable baffles or tone controls, so the sound is fixed once installed.

7. **Potential for Vibration**

- **Increased Vibration in Some Cases:** The lighter weight of the exhaust can sometimes lead to **more noticeable vibrations** at high RPM, especially on rough terrain. Some riders report this as a minor annoyance, though it varies by bike and riding style.

8. **Compatibility Quirks**

- **May Require Minor Modifications:** While designed for drop-in fitment, some riders report needing to **file or adjust heat shields** or **extend mounting brackets** for a perfect fit, especially on older or heavily modified bikes.

- **Not Universal Across All Models:** While it fits KTM/Husqvarna 250/350/500cc air-cooled singles, **liquid-cooled models (e.g., KTM 500 EXC-F) may require additional work** to ensure proper sealing and heat management.

---

### **Conclusion**

The **Akrapovi A490.05.981.00 slip-on exhaust** is one of the best aftermarket options for KTM and Husqvarna air-cooled single-cylinder bikes, offering **noticeable performance gains, a distinctive sound, and high durability**. It is ideal for riders who want a **straightforward, high-quality upgrade** that enhances both power and aesthetics without requiring major modifications.

However, it is **not without drawbacks**. The **loudness** is the biggest downside, as it may violate local noise laws unless mitigated. **Tuning is often necessary** to avoid engine issues, and the **cost** is higher than basic aftermarket alternatives. Additionally, **backfire risks and vibration** can be concerns for some riders.

For riders who prioritize **performance, sound, and brand reputation** and are willing to address the noise and tuning requirements, the A490 is an excellent choice. Those who prefer **quieter exhausts, lighter weight, or more customization options** may want to explore other brands or systems.

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### **Recommendation**

- You want a **proven, high-performance exhaust** that improves power and sound.

- You are prepared to **tune the bike** (remap or adjust carburetor) for optimal results.

- You don t mind the **loudness** and can either **install a mute** or **ride in compliant areas**.

- You prefer a **

Details:

300 Miles Of Street Use - Like New Titanium Fits 2020 To Current 4 Stroke EXC TFE model's.

part #: a4900598100 price

• $1121.12

specifications cyclemufflermo:

• for models: 250, 350, 500
• for makes: Ktm, Husqvarna
• brand: Akrapovic
• mpn: A490.05.981.00
• type: Muffler
• material: Titanium

payments cyclemufflermo:

• other
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• credit card: Diners-club

seller cyclemufflermo:

• # reviews: 10250
• rating: 99.6%
• city: East Aurora, New York

shipping cyclemufflermo:

• cost: $0.00
• service: USPS Ground Advantage
• type: Fixed
• class: Standard
• carrier: USPS
• transit: 3-9 Days

general cyclemufflermo:

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

offer cyclemufflermo:

• started: April 29, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 1

returns cyclemufflermo:

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

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