ARLEN NESS MN-42BV Inverted Air Cleaner Kit MN/42BV

( Brand: Arlen Ness ), ( Manufacturer Part Number: MN/42BV ), ( Color: Chrome ), ( Compatible Year: 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Fxdl Dyna Low Rider ), ( Bundle Description: 1 Pc Genuine Arlen Ness Inverted Series Air Cleaner Kits ), ( Type: Inverted Series Air Cleaner Kits ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review ARLEN NESS Mn/42bv Inverted Series Air Cleaner Kit Harley Davidson fits 2000–2009

The **Arlen Ness MN/42BV Inverted Air Cleaner Kit** is a meticulously engineered upgrade designed to enhance both the performance and longevity of your **2000 2009 Harley-Davidson** motorcycle, particularly those equipped with the **Evo II or Evolution engine** (commonly found in models like the **FLHR, FLSTF, FLSTF883, FLSTF883C, FLSTF883N, and FLSTF883S**). This premium aftermarket kit replaces the stock air cleaner with a high-flow, inverted-style system that not only improves airflow efficiency but also delivers superior filtration and protection for your engine s critical components. Crafted from durable materials, the **MN/42BV** features a **polyurethane foam pre-filter** that captures larger particles before they reach the main filter, reducing clogging and extending the life of the primary filter media. The **inverted design** ensures that dust and debris settle away from the intake tract, preventing contamination of the engine s intake valves and cylinders a common issue with traditional air cleaners. The kit includes a **high-quality cotton or synthetic filter element** (depending on the specific MN/42BV variant) that maintains optimal airflow while effectively trapping fine particulates, oil mist, and other contaminants. Installation is straightforward, requiring only basic tools, and the kit comes with all necessary mounting hardware, including a **sealed gasket** to prevent leaks and ensure a secure fit. Beyond performance gains, this air cleaner kit also contributes to a cleaner engine bay by reducing oil mist buildup, which can otherwise lead to sticky carburetors or fuel injection issues. Whether you re chasing extra horsepower, improving throttle response, or simply seeking a more reliable and maintainable air filtration system, the **Arlen Ness MN/42BV** stands out as a **high-performance, durable, and easy-to-service** solution that respects the heritage of your Harley while pushing it forward. Built to withstand the demands of long rides and high-mileage applications, this kit is a favorite among customizers, racers, and enthusiasts who demand nothing less than the best for their motorcycle.

The **Arlen Ness MN/42BV Inverted Air Cleaner Kit** is a popular aftermarket upgrade for Harley-Davidson motorcycles, particularly for the **2000-2009 models** with the **Evo V2 or Evolution engines**. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Arlen Ness MN/42BV Inverted Air Cleaner Kit**

1. **Improved Airflow and Performance**

The inverted design eliminates the restrictive "S" bend in the stock airbox, allowing for a more direct and unrestricted airflow path to the engine. This can lead to better throttle response, especially in low-RPM situations, and a slight increase in horsepower and torque.

2. **Enhanced Cooling of the Air Intake**

The inverted design keeps the air cleaner away from the hot exhaust headers, preventing heat soak. This ensures cooler, denser air enters the engine, which can improve combustion efficiency and reduce the risk of detonation.

3. **Easier Installation and Maintenance**

The kit is designed for straightforward installation, often requiring minimal modifications to the stock airbox or intake system. The inverted air cleaner is also easier to access for cleaning or replacement compared to some other aftermarket options.

4. **Compatibility with Other Performance Parts**

The MN/42BV kit works well with other performance upgrades, such as high-flow exhaust systems, cold air intakes, or performance cams. It is a modular solution that can be integrated into a broader tuning package.

5. **Reduced Restriction Compared to Stock**

The stock Harley air cleaner is known for being restrictive, especially in the "S" bend section. The Arlen Ness kit removes this restriction, which can make the engine feel more responsive, particularly in city stop-and-go driving.

6. **Durability and Quality**

Arlen Ness is a well-regarded brand in the motorcycle performance community, and their kits are generally built to last. The materials used are robust, and the design is proven over many years of use.

7. **Aesthetic Appeal**

The inverted air cleaner has a cleaner, more aggressive look compared to the stock unit. It is often considered a stylish upgrade that enhances the motorcycle s appearance.

8. **Backward Compatibility with Some Stock Components**

In some cases, the kit can be installed without requiring a full rebuild of the intake system, making it a cost-effective upgrade compared to more extensive modifications.

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### **Cons of the Arlen Ness MN/42BV Inverted Air Cleaner Kit**

1. **Potential for Increased Oil Consumption**

While not universal, some riders report increased oil consumption after installing an inverted air cleaner, particularly if the engine is already running lean or if the intake system is not properly sealed. This can be mitigated by ensuring the gaskets and seals are in good condition and by monitoring oil levels regularly.

2. **Noise Levels**

The inverted air cleaner can make the engine slightly louder, especially at idle or low RPM. While this is often considered a positive by enthusiasts, it may not be desirable for riders who prefer a quieter ride.

3. **Requires Regular Maintenance**

Like any air cleaner, the inverted unit will need to be cleaned or replaced periodically. The filter media may degrade over time, and the foam pre-filter (if included) will need to be cleaned or replaced. Neglecting maintenance can lead to reduced performance and potential engine damage from dirt or debris entering the intake.

4. **Potential for Improved Performance That Isn t Noticeable**

While the kit does improve airflow, the gains in horsepower and torque may be modest, especially if the rest of the engine and exhaust system are not optimized. Riders expecting dramatic performance improvements may be disappointed.

5. **Compatibility Issues with Some Modifications**

In rare cases, the kit may not fit perfectly with heavily modified engines or exhaust systems. Custom fabrication or additional modifications might be required, adding to the cost and complexity of installation.

6. **Cost Relative to Stock**

The Arlen Ness kit is more expensive than the stock air cleaner, though the price is justified by the performance and durability benefits. For budget-conscious riders, this may be a consideration.

7. **Potential for Increased Carbon Buildup**

With improved airflow, some engines may experience increased carbon buildup on valves or pistons, particularly if the rider uses lower-quality fuel or does not maintain the engine properly. Regular valve cleaning and oil changes can help mitigate this issue.

8. **Not a Standalone Performance Solution**

The kit is an intake upgrade, not a complete engine modification. For significant performance gains, it should be paired with other upgrades, such as a performance exhaust, tuning, or camshafts.

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### **Conclusion**

The **Arlen Ness MN/42BV Inverted Air Cleaner Kit** is a well-designed and effective upgrade for Harley-Davidson motorcycles from 2000 to 2009. It addresses many of the shortcomings of the stock air cleaner by improving airflow, reducing restriction, and enhancing cooling. The kit is relatively easy to install, durable, and compatible with other performance parts, making it a popular choice among enthusiasts.

However, it is not without drawbacks. Potential issues include increased oil consumption, noise, maintenance requirements, and modest performance gains unless paired with other upgrades. For riders looking to enhance their motorcycle s performance, aesthetics, and drivability, the kit is a strong recommendation. For those seeking dramatic power increases or minimal maintenance, additional research or modifications may be necessary.

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### **Recommendation**

If you are considering the **Arlen Ness MN/42BV Inverted Air Cleaner Kit** for your 2000-2009 Harley-Davidson, it is a worthwhile upgrade for most riders. Here s how to approach it:

- You want improved throttle response and airflow.

- You are willing to perform regular maintenance (cleaning or replacing the filter).

- You are open to pairing it with other performance parts for greater gains.

- You appreciate the aesthetic benefits of an inverted air cleaner.

- You are concerned about increased oil consumption and want to minimize risks (in which case, ensure your engine is in good condition and monitor oil levels closely).

- You prefer a quieter ride and are not bothered by the slight increase in noise.

- You are on a tight budget and want to prioritize other upgrades first.

- A high-quality performance exhaust system (e.g., Akrapovic, Hossack, or Arrow).

- A cold air intake (if not already included in the kit).

- Regular engine maintenance, including oil changes and valve cleaning.

- You are not comfortable with basic maintenance tasks.

- You expect dramatic power gains without additional modifications.

- Your motorcycle has significant engine issues that could be exacerbated by improved airflow.

In summary, the **Arlen Ness MN/42BV Inverted Air Cleaner Kit** is a solid choice for riders looking to enhance their Harley s performance and appearance. With proper maintenance and complementary upgrades, it can provide noticeable benefits without major drawbacks.

Details:

Arlen Ness Inverted Series Air Cleaner Kit for 2000 - 2009 Harley Davidson kk: Status: In Stock.

part #: mn42bv price

• $484.05

specifications intakefuelmotorcycle:

• for makes: Harley, Davidson
• for years: 2000-2009
• brand: Arlen Ness
• mpn: Mn/42bv
• color: Chrome
• compatible year: 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000
• compatible make: Harley Davidson
• compatible model: Fxdl Dyna Low Rider
• bundle description: 1 Pc Genuine Arlen Ness Inverted Series Air Cleaner Kits
• type: Inverted Series Air Cleaner Kits
• core charge: Free No Core Charge
• fitment type: Direct Replacement

offer intakefuelmotorcycle:

• started: February 20, 2026
• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home

general intakefuelmotorcycle:

• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery
• condition: New

shipping intakefuelmotorcycle:

• transit: 3-4 Days
• type: Fixed
• service: Standard
• cost: $0.00
• class: Standard

returns intakefuelmotorcycle:

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

payments intakefuelmotorcycle:

• other
• credit card: Visa
• wallet: Apple-pay

seller intakefuelmotorcycle:

• rating: 98.8%
• # reviews: 17726
• city: Multiple warehouses

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