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  3. MOROSO MN/4775

MOROSO MN-4775 Air Cleaner Oil Separator Cams Lh MN/4775 Air/oil

fits model: Twin. year: 2014–2017.

4775 Moroso Mn/4775 Air/oil Separator For Twin Cams With Stock Air Cleaner 2014-2017 Lh

( Brand: Moroso ), ( Manufacturer Part Number: MN/4775 ), ( Color: Black ), ( Compatible Year: 2017 2016 2015 2014 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Fxdl Low Rider ), ( 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/4775 Air/oil Separator Cams Stock Air Cleaner Lh fits TWIN 2014–2017

The **Moroso MN/4775 Air/Oil Separator** is a meticulously engineered aftermarket component designed specifically for twin-cam V8 engines equipped with Moroso air cleaners, covering the 2014 through 2017 model years of select Ford Mustang and Shelby GT500 vehicles featuring the LH (Long Hood) body style. This high-performance separator serves as a critical interface between the air cleaner and the engine s induction system, ensuring optimal airflow while effectively trapping and recirculating oil mist that naturally escapes from the crankcase during operation. Crafted from durable, lightweight aluminum, the MN/4775 is built to withstand the demands of high-revving engines and aggressive driving conditions, offering a robust alternative to the stock separator, which is often prone to clogging or failure under heavy loads. Its precision-machined design includes a smooth, tapered inlet and outlet, minimizing turbulence and maximizing airflow efficiency, which is essential for maintaining peak engine performance and throttle response. The separator features a robust gasket system that guarantees a secure seal between the air cleaner housing and the intake manifold, preventing leaks that could compromise vacuum systems or introduce contaminants into the engine bay. Whether installed on a daily driver, a track-focused GT500, or a high-mileage muscle car, this separator is engineered to deliver reliable operation, reducing maintenance downtime and extending the lifespan of both the air cleaner and the engine s internal components. Ideal for enthusiasts seeking a direct-fit, performance-oriented upgrade, the Moroso MN/4775 is a testament to the brand s commitment to quality and compatibility, ensuring seamless integration with the stock Moroso air cleaner system while elevating overall engine breathing and longevity.

The Moroso MN/4775 Air/Oil Separator is designed to replace the stock air cleaner on 2014 2017 Lincoln Heritage (LH) twin-cam engines, particularly those with oil-bath air cleaners. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

### Pros:

1. **Improved Airflow and Performance** The Moroso separator is designed to provide cleaner, more efficient airflow to the engine compared to the stock unit. It reduces oil carryover into the intake system, which can improve throttle response and overall engine performance.

2. **Durability and Quality** Moroso is a well-known brand in the performance aftermarket, known for producing high-quality, durable components. The MN/4775 is built to last, with a sturdy construction that can withstand the demands of daily driving and occasional track use.

3. **Easier Maintenance** The separator features a removable oil bath, making it easier to drain and refill oil compared to some stock units. This simplifies routine maintenance, ensuring the air cleaner remains effective over time.

4. **Compatibility with Performance Upgrades** If you plan to add performance parts like a turbocharger, supercharger, or high-flow intake, the Moroso separator provides a solid foundation for improved airflow. It s also compatible with aftermarket air filters, such as K&N or Cone Filters, which can further enhance performance.

5. **Reduced Oil Contamination** The stock air cleaner on some LH engines can develop oil leaks or excessive oil buildup, leading to clogged intake systems. The Moroso separator helps mitigate this issue by better separating oil from the air before it enters the engine.

6. **Aesthetic Appeal** The Moroso separator has a cleaner, more modern look compared to the stock unit, which may appeal to those who want a more polished appearance under the hood.

7. **Warranty Support** Moroso offers warranty coverage on their products, providing peace of mind in case of manufacturing defects.

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### Cons:

1. **Cost** The Moroso MN/4775 is more expensive than the stock air cleaner, especially when factoring in installation labor if you re not comfortable doing it yourself. While it s a performance upgrade, the price may be a deterrent for budget-conscious buyers.

2. **Installation Complexity** Replacing the stock air cleaner with the Moroso separator requires some mechanical skill, particularly if you re unfamiliar with working on the LH s intake system. It may involve disconnecting hoses, removing the stock unit, and ensuring a proper seal with the new separator. If done incorrectly, it could lead to leaks or airflow restrictions.

3. **Oil Management Required** Unlike some aftermarket filters that are dry (e.g., K&N), the Moroso separator requires regular oil changes (typically every 10,000 15,000 miles) to maintain optimal performance. Forgetting to change the oil can lead to clogged filters and reduced efficiency.

4. **Potential for Oil Leaks** If the separator isn t installed correctly or if the gaskets/seals degrade over time, oil can leak into the intake system, negating some of the benefits of the upgrade. Regular inspections are necessary to catch leaks early.

5. **Limited Track Use** While the Moroso separator is suitable for daily driving and light track use, it may not be ideal for aggressive track sessions where extreme heat and oil breakdown could occur. In such cases, a dry filter (e.g., K&N) might be a better choice.

6. **Not a Direct Drop-In** The Moroso separator is not a perfect drop-in replacement for the stock unit. Some minor modifications or adjustments (e.g., routing hoses, trimming intake tubes) may be required to ensure a proper fit, depending on the specific LH model and year.

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### Conclusion:

The Moroso MN/4775 Air/Oil Separator is a solid upgrade for the 2014 2017 Lincoln Heritage twin-cam engine, offering improved airflow, better oil separation, and durability. It s particularly beneficial for those who want to maintain or enhance their engine s performance while keeping the oil-bath system. However, it requires regular maintenance (oil changes) and careful installation to avoid issues like leaks or airflow restrictions.

If you re looking for a straightforward, high-quality upgrade that fits within the stock intake system and improves reliability, the Moroso separator is a strong choice. That said, if you re on a tight budget or prefer a dry filter system, alternatives like the K&N or Cone Filters might be worth considering, though they lack the oil separation benefits.

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### Recommendation: **Buy the Moroso MN/4775 if:**

- You want a reliable, high-quality air/oil separator that improves airflow and reduces oil contamination.

- You re willing to invest in regular oil changes (every 10,000 15,000 miles) to maintain performance.

- You plan to keep the oil-bath system or are open to pairing it with an aftermarket dry filter.

- You re comfortable with a slightly more involved installation process.

**Avoid or consider alternatives if:**

- You re on a tight budget and prefer a simpler, lower-cost upgrade.

- You prioritize a dry filter system (e.g., K&N) for track use or extreme conditions.

- You re not confident in performing the installation yourself and don t want to risk leaks or improper sealing.

For most daily drivers who want a balance of performance and reliability, the Moroso MN/4775 is a worthwhile investment. Just ensure you follow installation guidelines and maintenance schedules to get the best results.

Details:

Moroso Air/Oil Separator for Twin Cams with Stock Air Cleaner 2014 - 2017 lh: Status: In.

part #: mn4775 price

  • $373.16

specifications intakefuelmotorcycle:

  • for models: Twin
  • for years: 2014-2017
  • brand: Moroso
  • mpn: Mn/4775
  • color: Black
  • compatible year: 2017 2016 2015 2014
  • compatible make: Harley Davidson
  • compatible model: Fxdl Low Rider
  • 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:

  • availability: In Stock
  • sold: 0
  • options: Ship-to-home
  • quantity: 1
  • started: March 23, 2026

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  • city: Multiple warehouses
  • rating: 99.0%
  • # reviews: 19401

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  • class: Standard
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general intakefuelmotorcycle:

  • Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery
  • condition: New
for models: twin, for years: 2014-2017, compatible year: 2017 2016 2015 2014, compatible make: harley davidson, compatible model: fxdl low rider, 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,
category: motorcycle parts > motorcycle scooter parts accessories > air intake fuel delivery, color: black, sku: 23090980664694633,
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