ARLEN NESS MN-DJ0J Inverted Air Cleaner Kit MN/DJ0J

( Brand: Arlen Ness ), ( Manufacturer Part Number: MN/DJ0J ), ( Color: Black ), ( Compatible Year: 2012 2011 2010 2009 2008 2007 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Xl1200n Sportster 1200 Nightster ), ( 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/dj0j Inverted Series Air Cleaner Kit Harley Davidson Mo fits 2007–2012

The **Arlen Ness MN/DJ0J Inverted Air Cleaner Kit** is a meticulously engineered upgrade designed to enhance the performance, reliability, and longevity of the **2007 2012 Harley-Davidson Motorcycle Oil (MN) and Dual Injection (DJ0J) engines**. This premium aftermarket kit replaces the stock air cleaner with a high-flow, inverted-style system that maximizes airflow while minimizing restrictions, ensuring cleaner intake air and improved combustion efficiency. Crafted from durable materials, the kit features a **large-capacity foam pre-filter** that efficiently traps dust, debris, and contaminants before they reach the main filter, significantly reducing wear on the engine s internal components. The **inverted design** eliminates the need for frequent filter replacements, as the pre-filter can be easily cleaned and reused, making maintenance both cost-effective and hassle-free. The kit also includes a **high-quality, high-flow main filter** that maintains optimal airflow while providing superior filtration, reducing carbon buildup and extending the life of critical engine parts like the throttle body, intake valves, and spark plugs. Beyond performance benefits, the Arlen Ness kit enhances the motorcycle s overall reliability, particularly in dusty or off-road conditions, by preventing clogged filters and ensuring consistent power delivery. Whether cruising on the highway or tackling rugged terrain, this kit delivers a noticeable improvement in throttle response, fuel efficiency, and engine protection, making it an essential upgrade for riders seeking both performance and durability. Backed by Arlen Ness s reputation for precision engineering and quality craftsmanship, this kit is a trusted choice for Harley-Davidson enthusiasts looking to optimize their bike s performance without compromising on filtration or ease of maintenance.

### Pros and Cons of buying a Arlen Ness MN/DJ0J Inverted Air Cleaner Kit for a 2007 2012 Harley-Davidson MO

#### **Pros**

1. **Improved Airflow and Performance** The inverted air cleaner design reduces turbulence and allows for smoother airflow into the engine, which can enhance throttle response and power output. This is particularly noticeable in stock or mildly modified engines where airflow restrictions are a common issue.

2. **Enhanced Cooling** The inverted design helps keep the air cleaner cooler, reducing the risk of heat-related restrictions (such as clogging from oil or debris) that can occur in traditional top-mounted air cleaners.

3. **Easier Maintenance** The kit often comes with a removable, washable element (depending on the model), making it simpler to clean or replace compared to some factory air cleaners that require full disassembly.

4. **Aesthetic Appeal** The sleek, inverted design is visually appealing and aligns with the modern, aggressive styling of modern Harley-Davidsons, giving the bike a more customized look.

5. **Compatibility with Aftermarket Mods** Since the kit is designed for the 2007 2012 MO, it integrates well with other aftermarket parts like intake systems, exhaust headers, or performance chips, allowing for a cohesive upgrade path.

6. **Reduced Backpressure** By minimizing airflow resistance, the inverted cleaner can help maintain better vacuum levels for accessories like fuel pumps or exhaust systems, indirectly supporting overall drivability.

7. **Durability** Arlen Ness products are generally well-built, with high-quality materials that can withstand the rigors of daily riding and off-road use.

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#### **Cons**

1. **Cost** The Arlen Ness kit is not a budget-friendly upgrade. Pricing can range from $200 to $400 depending on the specific model and whether it includes additional components like intake tubes or gaskets. This is a significant investment for an air cleaner alone.

2. **Installation Complexity** While not overly difficult, installing an inverted air cleaner requires careful attention to sealing, routing, and securing the new components. Improper installation can lead to leaks, reduced performance, or even damage to the engine bay.

3. **Potential for Increased Dirt Ingestion** The inverted design places the air cleaner lower on the bike, where it may be more exposed to road debris, mud, or water splashes. This could lead to more frequent cleaning or replacement of the air filter element, especially in off-road or wet conditions.

4. **Limited Stock Availability** Arlen Ness parts can sometimes be harder to find than OEM or more mainstream aftermarket brands. If the kit fails or needs replacement, sourcing parts may take longer than expected.

5. **Compatibility with Stock Intake Systems** If your bike has a stock intake system, you may need to purchase additional components (such as a new intake tube or plenum) to fully integrate the inverted cleaner. This adds to the overall cost and complexity.

6. **Mixed Reviews on Performance Gains** While many riders report noticeable improvements in airflow and throttle response, the gains may not be dramatic enough to justify the cost for those who are not heavily modifying their bike. Expectations should be realistic this is not a "power-adding" modification but rather an airflow refinement.

7. **Potential for Voiding Warranty** If your Harley is still under factory warranty, installing an aftermarket air cleaner kit may void certain coverage, depending on the terms of your warranty agreement.

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### **Conclusion**

The Arlen Ness MN/DJ0J inverted air cleaner kit is a worthwhile upgrade for riders who prioritize airflow efficiency, aesthetics, and a more modern look for their 2007 2012 Harley-Davidson MO. It offers tangible benefits in terms of performance and cooling, particularly for those who ride in hot climates or push their bikes harder than stock. However, the cost, installation effort, and potential maintenance challenges mean it is best suited for riders who are already investing in other performance upgrades or who appreciate the visual and functional improvements it provides.

For casual riders or those on a tight budget, the benefits may not outweigh the drawbacks. In such cases, a simpler aftermarket air cleaner (like a K&N or a basic inverted cleaner from a different brand) could offer similar airflow benefits at a lower cost.

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### **Recommendation**

- You are already modifying your bike (e.g., with exhaust headers, intake systems, or performance chips) and want a cohesive upgrade.

- You notice restricted airflow or poor throttle response in your stock setup.

- You value the aesthetic appeal of an inverted air cleaner and are willing to invest in a high-quality, durable solution.

- You ride in hot climates or frequently push your bike hard, as the improved cooling will be beneficial.

- You are primarily a cruiser who rarely rides hard or modifies the bike.

- You are concerned about the cost and want a more budget-friendly alternative.

- You frequently ride in muddy or off-road conditions where dirt ingestion could be an issue.

- Your bike is still under warranty, and you are unwilling to risk voiding coverage.

- If the Arlen Ness kit is too expensive, consider a **K&N inverted air cleaner** or a **basic aftermarket inverted cleaner** from brands like **DynoMax or Screamin Eagle**, which offer similar airflow benefits at a lower price.

- If you are also upgrading your intake system, bundle the air cleaner with a **performance intake tube** (e.g., from **Arlen Ness or DynoMax**) to maximize gains.

- Ensure you have the necessary tools and mechanical skill for installation, or consult a Harley dealer or performance shop if you are unsure.

Details:

Arlen Ness Inverted Series Air Cleaner Kit for 2007 - 2012 Harley Davidson mo: Status: In Stock.

part #: mndj0j price

• $484.05

specifications intakefuelmotorcycle:

• for makes: Harley, Davidson
• for years: 2007-2012
• brand: Arlen Ness
• mpn: Mn/dj0j
• color: Black
• compatible year: 2012 2011 2010 2009 2008 2007
• compatible make: Harley Davidson
• compatible model: Xl1200n Sportster 1200 Nightster
• 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: 22109
• city: Multiple warehouses

returns intakefuelmotorcycle:

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

offer intakefuelmotorcycle:

• sold: 0
• started: May 3, 2026
• availability: In Stock
• quantity: 1
• options: Ship-to-home

payments intakefuelmotorcycle:

• wallet: Paypal
• other
• credit card: Discover

general intakefuelmotorcycle:

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

shipping intakefuelmotorcycle:

• cost: $0.00
• type: Fixed
• service: Standard
• class: Standard
• transit: 3-5 Days

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