fits model: Twin. year: 2004–2006.

( Brand: Moroso ), ( Manufacturer Part Number: MN/X55G ), ( Compatible Year: 2006 2005 2004 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Fxdi Dyna Super Glide ), ( 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 )
The **Moroso MN/X55G Air/Oil Separator** is a meticulously engineered aftermarket component designed specifically for twin-cam equipped vehicles from the 2004 to 2006 model years, including the iconic **UO (Unicam) platform** most notably the **Mitsubishi Eclipse, Lancer, and Galant** as well as select **Dodge Neon** and **Chrysler PT Cruiser** models. This high-performance separator serves as a critical link between the air cleaner and the engine s intake system, ensuring optimal airflow while effectively filtering out oil vapors and contaminants that can compromise engine efficiency and longevity. Crafted from durable **aluminum alloy**, the X55G features a robust, lightweight construction that resists corrosion and withstands the rigors of high-performance driving, making it an ideal upgrade for both street and track applications. Its **universal fitment** eliminates the need for custom modifications, allowing for a straightforward installation that preserves the stock air intake system s functionality while enhancing its performance. The separator s **precision-engineered design** includes a **dual-stage filtration system**, combining a **primary oil catcher** with a **secondary air filter interface**, which minimizes oil carryover into the intake manifold, reducing carbon buildup on intake valves a common issue in high-mileage or modified engines. This not only improves throttle response and fuel efficiency but also extends the life of critical engine components by preventing harmful deposits. Whether you re running a **stock air cleaner setup** or upgrading to a **high-flow aftermarket filter**, the Moroso MN/X55G ensures a seamless transition, maintaining a clean and unrestricted airflow path while protecting your engine from the detrimental effects of oil contamination. Built to meet or exceed OEM standards, this separator is a testament to Moroso s commitment to quality, offering a reliable and cost-effective solution for enthusiasts seeking to optimize their twin-cam-powered vehicles without sacrificing performance or reliability.
**Pros and Cons of buying a Moroso MN/X55G Air/Oil Separator for Twin Cam Air Cleaner (2004 2006 UO)**
### **Pros:**1. **Compatibility and Fit:** The Moroso MN/X55G is specifically designed for the 2004 2006 UO (Unified Off-Road) platform with Twin Cam engines, ensuring a proper fit without modifications. It integrates seamlessly with the stock air cleaner housing and intake system, reducing the need for additional adapters or welding.
2. **Improved Oil Separation:** The X55G model features a more efficient oil separation system compared to stock air cleaners. It uses a larger, more effective baffle and a secondary oil trap, which helps reduce oil carryover into the intake. This can lead to cleaner air entering the engine, potentially improving throttle response and reducing carbon buildup on intake valves.
3. **Durability and Quality:** Moroso is a well-regarded brand in the performance aftermarket, known for producing durable, high-quality components. The X55G is constructed from sturdy materials, including a reinforced plastic housing and metal components, which should withstand the rigors of off-road use.
4. **Ease of Installation:** The Moroso MN/X55G is designed for straightforward installation. It replaces the stock air cleaner assembly with minimal tools required, and the included gaskets and mounting hardware ensure a secure fit. This makes it a practical upgrade for DIYers or mechanics without extensive experience.
5. **Performance Benefits:** By reducing oil carryover, the X55G can help maintain better engine performance over time. Less oil fouling the intake means the engine can breathe more efficiently, which may translate to improved acceleration and fuel economy, especially in demanding conditions.
6. **Maintenance Convenience:** The design allows for easier oil changes and cleaning of the separator. The oil drain plug and accessible baffle make servicing the component more straightforward compared to some aftermarket alternatives that require disassembly of the entire airbox.
7. **Compatibility with Other Moroso Products:** If you re already using or plan to use other Moroso components (e.g., air filters, intake systems, or performance parts), the X55G integrates well with Moroso s ecosystem, ensuring a cohesive upgrade path.
---
### **Cons:**1. **Cost:** The Moroso MN/X55G is more expensive than a basic stock air cleaner or even some aftermarket alternatives. For riders who prioritize budget-friendly upgrades, this could be a significant investment, especially if other components need replacing simultaneously.
2. **Limited Off-Road Specificity:** While the X55G is an improvement over stock, it is not specifically optimized for extreme off-road use (e.g., deep mud, heavy dust, or extreme dust storms). In such conditions, additional modifications (like a full off-road air intake system) may still be necessary to maximize airflow and protection.
3. **Weight:** The Moroso separator adds some weight to the air intake system compared to a lightweight aftermarket filter or a minimalist setup. While the difference is negligible for most riders, it may be a consideration for those prioritizing weight reduction.
4. **Potential for Oil Leaks:** Like any air/oil separator, the X55G relies on gaskets and seals to prevent oil leaks. Over time, these can degrade, especially under harsh conditions. Regular maintenance is required to inspect and replace gaskets as needed, which some riders may forget or overlook.
5. **Installation Space Constraints:** Depending on your bike s setup (e.g., aftermarket handlebars, fairings, or other modifications), there may be limited clearance for the X55G. In some cases, minor adjustments to the bike s wiring or mounting points might be necessary to accommodate the separator without interference.
6. **Mixed Reviews on Longevity:** While Moroso products are generally reliable, some users report that the oil separation efficiency declines over time, particularly if the separator is not cleaned or serviced regularly. This could lead to increased oil carryover and reduced performance if maintenance is neglected.
7. **Not a Full Air Intake Replacement:** The X55G is an upgrade to the stock air cleaner, not a full performance air intake system. If you re looking for significant horsepower gains or a more aggressive off-road intake, you may need to pair it with a separate high-flow air filter or intake manifold.
---
### **Conclusion and Recommendation:**The Moroso MN/X55G air/oil separator is a solid upgrade for the 2004 2006 UO Twin Cam air cleaner system, offering tangible improvements in oil separation and durability over the stock component. It strikes a balance between performance and practicality, making it a worthwhile investment for riders who want to enhance their bike s reliability and intake efficiency without undertaking a full air intake overhaul.
**Recommendation:**- **Buy it if:** You want a straightforward, high-quality upgrade that reduces oil carryover and improves intake cleanliness without major modifications. It s ideal for riders who prioritize longevity, ease of maintenance, and compatibility with their existing setup.
- **Consider alternatives if:** You re operating in extreme off-road conditions where a more aggressive air intake system (e.g., a full off-road filter or a performance intake) would be more beneficial. If budget is a concern, you might also explore other brands like K&N or Mann-Filter, which offer competitive options.
- **Pair it with:** A high-quality off-road air filter (e.g., Moroso MN/X55G filter or a K&N off-road filter) and regular maintenance to ensure optimal performance. If you plan to run the bike hard, consider adding a secondary oil drain or a more robust intake system in the future.
For most riders seeking a reliable, no-frills upgrade to their stock air cleaner, the Moroso MN/X55G is a strong choice. However, those with specific performance goals or extreme riding conditions may need to supplement it with additional components.
Moroso Air/Oil Separator for Twin Cams with Stock Air Cleaner 2004 - 2006 uo: Status: In.