ARLEN NESS MN-0B4Y Inverted Air Cleaner Ox Kit MN/0B4Y

( Brand: Arlen Ness ), ( Manufacturer Part Number: MN/0B4Y ), ( Color: Black ), ( Compatible Year: 2006 2005 2004 2003 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Flhti Electra Glide Standard ), ( 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/0b4y Inverted Series Air Cleaner Kit Harley Davidson Ox fits 2003–2006

The **Arlen Ness MN/0B4Y Inverted Air Cleaner Kit** is a meticulously engineered upgrade designed to enhance both the performance and longevity of your 2003 2006 Harley-Davidson Softail Ox. This high-quality kit replaces the stock air cleaner with a precision-machined inverted system, featuring a durable **polyurethane foam pre-filter** and a **high-flow paper main filter**, both of which are engineered to maximize airflow while minimizing restriction. The inverted design ensures that dust, debris, and moisture are effectively trapped before reaching the engine, significantly reducing wear on the intake system and improving overall engine efficiency. Crafted from **high-grade materials**, including a sturdy **aluminum housing** and a **sealed gasket system**, this kit is built to withstand the demands of long rides and harsh conditions, offering superior protection compared to conventional air cleaners. The kit includes a **cleanable pre-filter**, allowing for easy maintenance and extended service intervals, while the **high-quality paper filter** provides exceptional filtration without compromising airflow. Installation is straightforward, with clear instructions and compatible mounting hardware, ensuring a seamless fit for your Softail Ox. Whether you're seeking improved throttle response, better fuel economy, or enhanced engine protection, the Arlen Ness MN/0B4Y Inverted Air Cleaner Kit delivers a reliable, performance-focused solution that stands out as a premium choice for Harley-Davidson enthusiasts.

### **Pros and Cons of the Arlen Ness MN/0B4Y Inverted Air Cleaner Kit for a 2003 2006 Harley-Davidson Softail (Ox) Motorcycle**

1. **Improved Airflow and Performance** The inverted air cleaner design reduces turbulence and allows for a more direct flow of air into the engine, which can enhance throttle response and power output, especially in stock or mildly modified engines.

2. **Better Filtration Efficiency** The kit often includes a high-quality foam or paper filter element that can trap more contaminants than the stock airbox, potentially extending the life of internal engine components.

3. **Easier Installation** Compared to some aftermarket air cleaner systems, the Arlen Ness MN/0B4Y kit is designed to fit stock Harley-Davidson airbox mounts, making installation straightforward for most riders without extensive mechanical experience.

4. **Aesthetic Appeal** The inverted design gives the airbox a cleaner, more aggressive look, which some riders prefer over the stock box s bulkier appearance.

5. **Compatibility with Stock and Mild Mods** Since it s designed for the Harley Softail (Ox) platform, it integrates well with stock air intake systems and can be paired with mild performance upgrades (e.g., headers, exhaust) without major conflicts.

6. **Durability** Arlen Ness products are generally well-built, with sturdy mounting brackets and materials that can withstand regular use and minor off-road conditions.

7. **Potential for Future Upgrades** The kit can serve as a stepping stone for more advanced air intake systems (e.g., cold air intakes, high-flow filters) if the rider decides to modify further.

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1. **Limited Performance Gains** While the inverted design improves airflow, the gains may not be dramatic unless the engine is already tuned or paired with other performance modifications (e.g., headers, ECU tuning). Expect modest improvements rather than significant power increases.

2. **No Cold Air Intake Benefits** Unlike some aftermarket cold air intake systems, the Arlen Ness MN/0B4Y kit does not route air from outside the engine bay, meaning it won t provide the same density and temperature advantages as a true cold air intake.

3. **Potential for Increased Noise** Some riders report that the inverted design can make the air cleaner slightly louder under hard acceleration, though this is subjective and may not be noticeable to everyone.

4. **Maintenance Requirements** The foam or paper filter will need regular cleaning or replacement (every 5,000 10,000 miles, depending on riding conditions), which adds minor upkeep compared to a permanent paper filter system.

5. **Stock Airbox Mount Compatibility** While the kit is designed for the Harley, some riders report minor fitment issues if the stock airbox has been modified or if the bike has aftermarket exhaust or intake changes. Double-checking measurements is advisable.

6. **Cost Relative to Benefits** For the price, the performance gains may feel underwhelming unless paired with other mods. Riders looking for significant power increases might find better value in other performance-oriented air intakes or exhaust systems.

7. **Potential for Oil Leaks** If the bike has a history of oil leaks (e.g., from the valve cover gasket or PCV system), the inverted air cleaner could exacerbate intake contamination if oil drips into the airbox.

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The **Arlen Ness MN/0B4Y Inverted Air Cleaner Kit** is a solid, practical choice for riders who want a **simple, effective, and visually appealing upgrade** to their 2003 2006 Harley-Davidson Softail (Ox). It offers **modest performance improvements**, **better filtration**, and **easy installation** without requiring major modifications to the bike. However, it is **not a high-performance solution** it won t drastically increase power or replace the need for other upgrades like headers or exhaust systems.

If your primary goals are **aesthetics, minor airflow enhancements, and low-maintenance upgrades**, this kit is a worthwhile investment. If you re seeking **significant power gains or cold air intake benefits**, you may want to explore other aftermarket options (e.g., K&N, Dyno Dog, or full cold air intakes).

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- You want a **simple, reliable upgrade** that improves airflow and looks better than the stock airbox.

- You ride mostly on highways or in clean conditions and don t need extreme performance.

- You re open to pairing it with other mods (e.g., headers, exhaust) for better results.

- You want **more noticeable performance gains** (e.g., a cold air intake or high-flow filter system).

- You ride in **dusty or dirty conditions** and prefer a permanent paper filter for easier maintenance.

- You re open to **full air intake systems** (e.g., Dyno Dog, K&N) that offer better airflow and filtration.

For most **stock or mildly modified Harley Softail (Ox) owners**, the Arlen Ness kit strikes a good balance between **cost, ease of installation, and practical benefits**. However, if performance is the top priority, investing in a **cold air intake or exhaust system** alongside this kit would yield better results.

Details:

Arlen Ness Inverted Series Air Cleaner Kit for 2003 - 2006 Harley Davidson ox: Status: In Stock.

part #: mn0b4y price

• $503.65

specifications intakefuelmotorcycle:

• for makes: Harley, Davidson
• for years: 2003-2006
• brand: Arlen Ness
• mpn: Mn/0b4y
• color: Black
• compatible year: 2006 2005 2004 2003
• compatible make: Harley Davidson
• compatible model: Flhti Electra Glide Standard
• 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

seller intakefuelmotorcycle:

• rating: 99.2%
• # reviews: 21816
• city: Multiple warehouses

general intakefuelmotorcycle:

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

shipping intakefuelmotorcycle:

• service: Standard
• class: Standard
• type: Fixed
• transit: 2-4 Days
• cost: $0.00

offer intakefuelmotorcycle:

• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: April 28, 2026
• quantity: 1

payments intakefuelmotorcycle:

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

returns intakefuelmotorcycle:

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

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