MOROSO MN-B4W0 Air Cleaner Oil Separator Cams Qh MN/B4W0 Air/oil

( Brand: Moroso ), ( Manufacturer Part Number: MN/B4W0 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Fls Softail Slim ), ( Bundle Description: 1 Pc Genuine Moroso Air/oil Separ ), ( Type: Air/oil Separator For Twin Cams With Stock Air Cleaner ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review MOROSO Mn/b4w0 Air/oil Separator Cams Stock Air Cleaner Qh fits TWIN 2016

The **Moroso MN/B4W0 Air/Oil Separator** is a meticulously engineered aftermarket component designed to enhance the performance and longevity of the **Twin Cam air cleaner system** found on **2016 Honda QH (Quad Racer) models**. This precision-crafted separator is specifically tailored to optimize airflow while effectively filtering out oil mist and contaminants, ensuring cleaner intake air for the engine. Built with high-quality materials, the separator features a robust **stainless steel construction** that resists corrosion and wear, guaranteeing durability even under demanding riding conditions. Its **smooth, aerodynamic design** minimizes turbulence, allowing for improved throttle response and better engine efficiency. The separator integrates seamlessly with the stock air cleaner setup, maintaining compatibility without requiring extensive modifications. Whether you're tackling rough terrain or cruising on paved roads, this air/oil separator helps reduce engine wear by preventing oil particles from entering the combustion chamber, ultimately contributing to a cleaner, more reliable power delivery. Ideal for riders who demand both performance and longevity from their Honda Quad Racer, the Moroso MN/B4W0 is a straightforward yet high-impact upgrade that ensures optimal engine protection and airflow management.

The Moroso MN/B4W0 Air/Oil Separator is designed to replace the stock air cleaner assembly on a 2016 QH (likely a Harley-Davidson Sportster or similar twin-cam engine bike). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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The Moroso separator is designed to provide a cleaner, more efficient airflow to the engine compared to the stock air cleaner. It reduces restriction, which can lead to better throttle response and slight power gains, especially noticeable in low-to-mid RPM ranges. The improved filtration also helps maintain engine cleanliness, reducing carbon buildup on intake valves and pistons.

Moroso is a well-regarded brand in the motorcycle aftermarket, known for producing high-quality, durable components. The B4W0 separator is made from materials that are resistant to wear and tear, and it includes a robust oil reservoir and filtration system. The design is also more robust than the stock unit, which may be prone to cracking or leaking over time.

The Moroso separator is designed to be a drop-in replacement for the stock air cleaner. Installation typically requires minimal tools and can be completed in under an hour, even for a beginner. The kit usually includes all necessary gaskets, clamps, and mounting hardware, simplifying the process.

The separator effectively removes oil from the air before it enters the engine, reducing oil consumption and preventing oil from fouling the intake system. This is particularly beneficial for bikes that see heavy use or are ridden in dusty conditions.

The B4W0 is specifically designed for the 2016 QH (or similar twin-cam engines), ensuring a proper fit without modifications. It is also compatible with other Moroso air cleaner systems, offering flexibility if you plan to upgrade your intake setup in the future.

The Moroso separator features a removable oil reservoir and filter, making maintenance straightforward. The oil can be changed regularly, and the filter can be cleaned or replaced as needed, ensuring consistent performance over time.

While not a functional benefit, the Moroso separator has a cleaner, more polished look compared to the stock unit. It can enhance the overall appearance of your bike, especially if you re running a custom air intake system.

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The Moroso B4W0 is more expensive than the stock air cleaner. While it offers significant improvements, the upfront cost may be a deterrent for budget-conscious riders. Prices typically range between $100 and $150, depending on where you purchase it.

If you re not riding in dusty or heavy-duty conditions, the benefits of the Moroso separator may not be as noticeable. For casual riders or those who primarily ride on paved surfaces, the stock air cleaner might suffice, and the additional cost may not be justified.

The separator requires regular oil changes (typically every 500 1,000 miles, depending on riding conditions). Forgetting to maintain the oil can lead to poor filtration and reduced performance. This adds a minor maintenance task to your routine.

If you re running other intake mods (e.g., a cold air intake or performance air filter), you ll need to ensure compatibility. While the Moroso separator is versatile, some setups may require additional adapters or modifications to integrate seamlessly.

While the separator is easy to install, some riders may find the maintenance process (e.g., cleaning the filter or changing the oil) slightly more involved than they re used to with the stock system. This could be a minor inconvenience for those unfamiliar with air/oil separator maintenance.

The Moroso separator is slightly heavier than the stock unit due to its robust construction. While the difference is minimal, it may be a consideration for riders who prioritize weight reduction in their mods.

Like any aftermarket component, there is a small risk of leaks or gasket failures, especially if installation is not done carefully. Ensuring proper sealing during installation is critical to avoid issues.

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The Moroso MN/B4W0 Air/Oil Separator is a high-quality, performance-oriented upgrade for the 2016 QH s air cleaner system. It offers significant benefits in terms of airflow efficiency, durability, and maintenance of engine cleanliness, particularly for riders who push their bikes hard or operate in dusty environments. The ease of installation and compatibility with other Moroso products further add to its appeal. However, the cost and the need for regular maintenance are drawbacks that may not be worth it for casual riders or those on a tight budget.

For riders who prioritize performance, longevity, and a cleaner intake system, the Moroso separator is a worthwhile investment. It strikes a balance between functionality and ease of use, making it a popular choice among enthusiasts. If you re already running or planning other intake mods (e.g., a cold air intake or performance filter), pairing it with the Moroso separator can create a cohesive and high-performing setup.

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If you re looking to upgrade your 2016 QH s air cleaner system and ride in conditions where dust, dirt, or heavy use is a concern, the Moroso MN/B4W0 Air/Oil Separator is highly recommended. It will provide noticeable improvements in airflow, engine cleanliness, and overall performance. Pair it with a high-quality performance air filter (such as a K&N or Moroso filter) for even better results.

For riders who primarily cruise on clean roads and don t want to deal with additional maintenance, the stock air cleaner may be sufficient. However, if you plan to run other intake mods or want a more robust and durable system, the Moroso separator is an excellent choice.

Ultimately, the decision depends on your riding habits, budget, and long-term goals for your bike. If you value performance and durability, the Moroso separator is a solid investment. If you re on a budget or ride lightly, the stock system might be adequate.

Details:

Moroso Air/Oil Separator for Twin Cams with Stock Air Cleaner 2016 qh: Status: In.

part #: mnb4w0 price

• $373.16

specifications intakefuelmotorcycle:

• for models: Twin
• for years: 2016
• brand: Moroso
• mpn: Mn/b4w0
• compatible make: Harley Davidson
• compatible model: Fls Softail Slim
• bundle description: 1 Pc Genuine Moroso Air/oil Separ
• type: Air/oil Separator For Twin Cams With Stock Air Cleaner
• core charge: Free No Core Charge
• fitment type: Direct Replacement

offer intakefuelmotorcycle:

• sold: 0
• availability: In Stock
• started: February 7, 2026
• options: Ship-to-home
• quantity: 1

general intakefuelmotorcycle:

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

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• type: Fixed
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