AKRAPOVIC M-HR064 Muffler Slip

( Brand: Akrapovic ), ( Manufacturer Part Number: M-HR064 ), ( Mounting Style: Slip-on ), ( Type: Muffler ), ( Color: Silver ), ( Placement On Vehicle: Exhaust, Rear )

Review AKRAPOVIC Slip on Muffler Kawasaki fits NINJA 250 400

The **Akrapovic M-HR064 Slip-On Muffler** is a meticulously engineered exhaust component designed to elevate the performance, aesthetics, and sound profile of the Kawasaki Ninja 250 and 400, offering a seamless blend of functionality and style. Crafted from high-grade stainless steel, this slip-on muffler showcases Akrapovic s signature attention to detail, with a polished, mirror-finish exterior that not only enhances the bike s visual appeal but also ensures long-lasting durability against the elements. The M-HR064 features a compact yet aggressive design, with a sleek, tapered shape that complements the aggressive stance of the Ninja while maintaining a low-profile silhouette that avoids excessive bulk. Its construction incorporates a robust internal baffling system, which optimizes exhaust flow to deliver a more linear and engaging power delivery, particularly noticeable in the mid-to-upper RPM range, where the bike s performance is most dynamic.

Under the hood, the muffler s design prioritizes efficiency without sacrificing tone, producing a deep, resonant growl that is both thrilling and road-legal, striking a perfect balance between sporty aggression and civilized manners. The slip-on nature of this muffler makes installation straightforward, requiring minimal modifications to the stock exhaust system, which appeals to riders seeking a straightforward upgrade without the complexity of a full exhaust swap. The M-HR064 also includes a high-quality, heat-resistant gasket and a durable clamp system, ensuring a secure and leak-proof fit that maintains performance integrity over time. Whether cruising on the highway or pushing the limits on the track, this muffler transforms the Ninja s voice into something more commanding, while its lightweight construction helps reduce overall weight without compromising structural integrity.

For riders who appreciate both performance and aesthetics, the Akrapovic M-HR064 is an ideal choice, offering a refined yet aggressive exhaust note that turns heads while delivering tangible benefits in power and responsiveness. Its compatibility with the Ninja 250 and 400 makes it a versatile option for enthusiasts looking to refine their bike s character without overhauling the entire exhaust setup. With Akrapovic s reputation for precision engineering and a focus on rider experience, this muffler stands as a testament to the brand s commitment to delivering exhaust solutions that are as functional as they are striking.

The Akrapovic M-HR064 slip-on muffler is a popular aftermarket exhaust option for the Kawasaki Ninja 250 and 400, offering performance and styling benefits. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

### **Pros of the Akrapovic M-HR064 Slip-On Muffler**

1. **Performance Gains**

The M-HR064 is designed to improve exhaust flow, reducing backpressure and allowing the engine to breathe more efficiently. This can lead to noticeable power increases, particularly in mid-to-high RPM ranges, where the Ninja s engine responds well to freer exhausting. Many riders report a more aggressive and linear power delivery, especially on the 400 model, which benefits from the additional displacement.

2. **Sound Characteristics**

Akrapovic mufflers are known for their aggressive yet controlled exhaust note. The M-HR064 produces a deep, growling tone with a pronounced mid-range growl, which is more pronounced than stock but still retains some musicality compared to fully open exhausts. This sound is often described as "muscular" and well-balanced, appealing to riders who want a sporty yet legal (in most regions) exhaust tone.

3. **Compatibility and Ease of Installation**

The slip-on design of the M-HR064 makes it relatively straightforward to install compared to full exhaust systems. It requires minimal modifications typically just removing the stock muffler and attaching the new one to the existing downpipe. This reduces labor costs and installation time, making it an attractive option for DIY enthusiasts or those who prefer a simpler upgrade.

4. **Durability and Build Quality**

Akrapovic mufflers are constructed with high-quality materials, including stainless steel and ceramic-lined internals in some models. The M-HR064 is built to withstand the demands of sport riding, though it may require periodic maintenance (e.g., checking for rust or internal wear) to ensure longevity. The slip-on design also means it can be removed and replaced more easily than a full exhaust system.

5. **Styling Appeal**

The M-HR064 features a sleek, aggressive design with a distinctive shape that complements the Ninja s sporty aesthetic. The matte black finish is durable and resistant to scratches, adding a premium look to the bike. The muffler s size and contouring also contribute to a more aggressive stance, which many riders appreciate.

6. **Legal Compliance (In Many Regions)**

In many countries, including the U.S. (with some state variations) and parts of Europe, slip-on mufflers like the M-HR064 are legal as long as they meet noise regulations (typically around 92 dB). However, riders should always verify local laws, as some regions may have stricter restrictions or require additional modifications (e.g., catalytic converters) to maintain compliance.

7. **Cost-Effective Upgrade**

Compared to full exhaust systems or more aggressive aftermarket options, the M-HR064 is relatively affordable. It offers a good balance between performance gains and cost, making it a practical choice for riders who want noticeable improvements without a significant investment.

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### **Cons of the Akrapovic M-HR064 Slip-On Muffler**

1. **Limited Power Gains Compared to Full Exhausts**

While the M-HR064 provides a meaningful performance boost, it is not as aggressive as a full Akrapovic exhaust system (e.g., the M-1 or M-2) or other aftermarket options like the Akrapovic M-100 or M-100R. Riders looking for maximum power gains may need to consider a full exhaust or a more open slip-on (e.g., the M-100). The power increase is more noticeable on the Ninja 400 than the 250 due to the latter s smaller displacement.

2. **Potential for Increased Exhaust Temperatures**

Freer exhausting can lead to higher exhaust gas temperatures, which may affect the longevity of the catalytic converter (if equipped) and other exhaust components. While the M-HR064 is designed to manage this, riders should monitor for signs of overheating, especially in stop-and-go traffic or high-stress riding conditions.

3. **Noise Levels May Exceed Legal Limits in Some Areas**

Although the M-HR064 is legal in many regions, its sound can be loud enough to draw attention or violate noise ordinances in areas with strict regulations. Riders should test the bike in their location to ensure compliance, as some jurisdictions may require additional modifications (e.g., a muffler with a built-in silencer) to meet legal noise standards.

4. **Potential for Vibration and Mounting Issues**

Slip-on mufflers can sometimes introduce additional vibration into the exhaust system, especially if the mounting points are not perfectly aligned or if the stock hangers are not reinforced. While the M-HR064 is designed to minimize this, riders may need to upgrade to aftermarket hangers or clamps for a smoother ride. Poor mounting can also lead to rattling or detachment at high speeds.

5. **Maintenance Requirements**

Over time, the ceramic lining or internal components of the muffler may degrade, leading to a loss of performance or a change in sound. The M-HR064 may require periodic cleaning or replacement of internal parts to maintain optimal function. Riders who neglect maintenance may experience reduced power or a harsher, less controlled exhaust note.

6. **Aesthetic Limitations**

While the M-HR064 looks aggressive, it may not appeal to riders who prefer a more subtle or stock-like appearance. The matte black finish is durable but can show scratches or wear over time, and the muffler s size may not suit bikes with limited under-seat clearance (though the Ninja s design accommodates it well).

7. **Potential for Backfires or Engine Issues**

In rare cases, a slip-on muffler like the M-HR064 can contribute to backfires or engine running issues if the air-fuel mixture becomes unstable due to the freer exhausting. This is more likely if other components (e.g., fuel system, ignition timing) are not properly tuned. Riders should ensure their bike is in good mechanical condition before installing the muffler.

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### **Conclusion**

The Akrapovic M-HR064 slip-on muffler is an excellent choice for Kawasaki Ninja 250 and 400 riders seeking a balance between performance, sound, and practicality. It delivers noticeable power gains, an aggressive yet controlled exhaust note, and easy installation without requiring a full exhaust swap. The build quality and styling are strong points, and it remains legal in most regions where slip-ons are permitted.

However, it is not the most extreme option available, so riders looking for maximum power or a more radical sound may need to consider other aftermarket exhausts. The potential for increased noise, vibration issues, and maintenance requirements should also be considered. For most riders, the M-HR064 offers a compelling upgrade that enhances both performance and aesthetics without significant drawbacks.

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### **Recommendation**

- Want a noticeable but legal performance boost without a full exhaust system.

- Prefer a growling, sporty exhaust tone that is more aggressive than stock but still controlled.

- Value ease of installation and cost-effectiveness.

- Appreciate the aggressive styling and durability of Akrapovic s design.

- Ensure the bike s fuel system and ignition timing are in good condition before installation.

- Consider upgrading to aftermarket hangers or clamps if vibration is a concern.

- Monitor exhaust temperatures and sound levels to ensure compliance with local laws.

- Perform regular maintenance to prolong the muffler s lifespan.

If you prioritize maximum power or a more extreme sound, explore full exhaust systems like the Akrapovic M-1 or M-2, or other slip-ons like the M-100. However, for most Ninja riders, the M-HR064 is an outstanding choice that delivers a significant upgrade with minimal hassle.

Details:

Please see photos for condition. Used working condition. Everything pictured is included. No hardware or clamps included.

part #: mhr064 prices

• $261.20-$642.44

specifications cyclemufflermo:

• for models: 250, 400, Ninja
• for makes: Kawasaki
• brand: Akrapovic
• mpn: M-hr064
• mounting style: Slip-on
• type: Muffler
• color: Silver
• placement on vehicle: Exhaust, Rear

offer cyclemufflermo:

• best offers: True
• sold: 0
• started: April 14, 2026
• availability: In Stock
• quantity: 1
• options: Ship-to-home

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• wallet: Google-pay
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seller cyclemufflermo:

• rating: 99.4%
• city: Lexington, Kentucky
• # reviews: 2104

shipping cyclemufflermo:

• class: Standard
• carrier: USPS
• cost: $40.95
• service: USPS Ground Advantage
• transit: 6-9 Days
• type: Calculated

general cyclemufflermo:

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

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• policy: No Returns

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