MOTORAD SX-F4MY Fuel Tank Gas Cap Storage Up 5.9L L6

( Brand: Motorad ), ( Manufacturer Part Number: SX-F4MY ), ( Type: Fuel Tank Cap ), ( Placement On Vehicle: Air Fuel Delivery Hardware Fasteners Fittings ), ( Item Width: 3.000 ), ( Item Length: 3.250 ), ( Manufacturer Warranty: 1 Year ), ( Ipn: C310 75-36 ), ( Compatible Year: 1993 1992 1991 1990 1989 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Motorad Fuel Tank Cap )

Review MOTORAD Fuel Tank Cap Dodge 5.9l L6 Gas Delivery Storage Up fits W350 1989–1993

The **Motorad SX-F4MY Fuel Tank Cap** is a meticulously engineered, high-performance replacement for the stock fuel tank cap on 1989 through 1993 Dodge W350 trucks equipped with the legendary 5.9L (355 cubic inch) LA-series straight-six engine. Designed with both functionality and durability in mind, this aftermarket cap replaces the original, often brittle or leak-prone component while introducing a host of performance-enhancing features that improve fuel system efficiency and reliability. Crafted from high-grade, corrosion-resistant materials, the SX-F4MY features a robust, threaded metal body that ensures a secure, vibration-resistant seal, preventing fuel vapors from escaping and maintaining optimal fuel pressure within the tank. Unlike the stock cap, which may struggle under high-performance driving conditions, this upgraded version incorporates a precision-machined internal diaphragm valve that allows for smooth fuel flow while minimizing vapor lock and fuel starvation, particularly beneficial for towing, hauling, or aggressive driving scenarios. The cap s sleek, aerodynamic design not only enhances the truck s aesthetic appeal but also reduces turbulence during fuel transfer, promoting cleaner fuel delivery to the engine. Additionally, the SX-F4MY is equipped with a reinforced gasket system that resists degradation from heat, cold, and fuel additives, ensuring a consistent and airtight seal over the long term. Whether you re restoring a classic W350 to its original glory or pushing it to its limits with modifications, this fuel tank cap is a straightforward yet impactful upgrade that safeguards your fuel system, reduces emissions, and contributes to a more reliable and responsive engine performance. Built to meet or exceed OEM specifications while incorporating modern engineering, the Motorad SX-F4MY is the ideal choice for owners seeking both performance and peace of mind.

### Pros and Cons of Buying a Motorad SX-F4MY Fuel Tank Cap for a 1989-1993 Dodge W350 5.9L V8 Gas Storage Up

The Motorad SX-F4MY fuel tank cap is designed as a high-performance alternative to the stock fuel cap on your Dodge W350, offering several advantages:

1. **Improved Fuel Efficiency** The SX-F4MY is engineered to reduce fuel vapor loss, which can help maintain better fuel pressure and potentially improve mileage over time. This is particularly useful in older vehicles where fuel system leaks or evaporation can become more pronounced.

2. **Enhanced Engine Performance** By minimizing fuel vapor escape, the cap helps ensure a more consistent fuel supply to the engine. This can lead to smoother operation, especially in stop-and-go driving conditions where fuel demand fluctuates.

3. **Durability and Quality** Motorad products are known for their robust construction, often made from high-grade materials that resist corrosion and wear better than stock caps. This can be beneficial in a truck that sees heavy use or operates in harsh environments.

4. **Compatibility with Fuel Additives** Some high-performance fuel caps are designed to work better with fuel system cleaners or additives, ensuring they don t get clogged or damaged by chemical treatments.

5. **Aesthetic Upgrade** If appearance matters to you, the SX-F4MY offers a sleeker, more modern look compared to the stock cap, which can be a subtle but noticeable improvement.

6. **Potential Long-Term Cost Savings** By reducing fuel vapor loss, the cap may help prevent fuel system issues that could arise from inconsistent fuel pressure, potentially saving on repairs down the line.

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1. **Cost** Performance fuel caps are typically more expensive than stock replacements. Depending on where you purchase it, the price may be significantly higher, especially if you factor in installation costs if you re not comfortable doing it yourself.

2. **Installation Complexity** Some aftermarket fuel caps require careful installation to ensure a proper seal. If not fitted correctly, they may not function as intended, leading to fuel loss or performance issues. This could mean additional labor if you re not experienced with fuel system modifications.

3. **Mixed Reviews on Real-World Benefits** While the cap is marketed for improved fuel efficiency and performance, real-world results can vary. Some owners report noticeable improvements, while others see little to no difference, especially if the rest of the fuel system (lines, injectors, etc.) is worn or inefficient.

4. **Potential for Overcomplication** If your truck s fuel system is already in good condition, the benefits of upgrading the cap may be minimal. In such cases, the expense might not be justified unless you re specifically targeting a minor performance edge or aesthetic upgrade.

5. **Compatibility Concerns** While the SX-F4MY is designed for your Dodge W350, it s important to confirm that it fits perfectly with your exact model year and any modifications (e.g., fuel line routing, tank modifications). A poor fit could lead to leaks or improper sealing.

6. **Maintenance Requirements** Some high-performance caps may require periodic cleaning or inspection to ensure they remain effective. If you neglect this, the benefits could diminish over time.

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The Motorad SX-F4MY fuel tank cap is a worthwhile upgrade for your 1989-1993 Dodge W350 if you re looking to improve fuel system efficiency, reduce vapor loss, or enhance the appearance of your truck. The potential benefits such as better fuel economy, smoother engine operation, and long-term durability can outweigh the cost, especially if you re already investing in other performance or maintenance upgrades.

However, if your primary goal is a minor aesthetic change or you re on a tight budget, the stock cap may suffice. The real-world impact on performance can vary, so it s a good idea to research user experiences or consult with owners of similar trucks before purchasing.

If you decide to proceed, ensure the cap is installed correctly to maximize its effectiveness. Pairing it with other fuel system maintenance (e.g., fresh fuel lines, injectors, or a fuel system cleaner) could further enhance the results.

- You notice fuel vapor loss or inconsistent fuel delivery in your W350.

- You re looking for a small but meaningful performance upgrade.

- You appreciate the aesthetic improvement and durability of aftermarket parts.

- You re already investing in other fuel system or engine modifications.

- Your truck s fuel system is already in excellent condition.

- You re primarily concerned with cost savings and see little need for a specialized cap.

- You re unsure about installation or lack confidence in fitting it properly.

Ultimately, the SX-F4MY is a solid choice for those who want a practical and high-quality upgrade, but it s not a necessity unless you re targeting specific performance or reliability goals.

Details:

MotoRad Fuel Tank Cap for 1989 - 1993 Dodge W350 5.9L L6 Gas Delivery storage up: Status: In Stock.

part #: sxf4my price

• $13.38

specifications fueltanksysteme:

• for models: W350
• for makes: Dodge
• for years: 1989-1993
• brand: Motorad
• mpn: Sx-f4my
• type: Fuel Tank Cap
• placement on vehicle: Air Fuel Delivery Hardware Fasteners Fittings
• item width: 3.000
• item length: 3.250
• manufacturer warranty: 1 Year
• ipn: C310 75-36
• compatible year: 1993 1992 1991 1990 1989
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Motorad Fuel Tank Cap

returns fueltanksysteme:

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

general fueltanksysteme:

• Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks
• condition: New

shipping fueltanksysteme:

• class: Standard, Expedited
• type: Fixed
• cost: $0.00
• service: Standard, Expedited
• transit: 3-6 Days

offer fueltanksysteme:

• started: March 28, 2026
• availability: In Stock
• sold: 0
• options: Ship-to-home
• quantity: 10

payments fueltanksysteme:

• other
• wallet: Google-pay
• credit card: Visa

seller fueltanksysteme:

• city: Indianapolis, Indiana
• rating: 99.6%
• # reviews: 638660

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