MOTORAD SX-4ZET Fuel Tank Gas Cap Storage Air Gm

( Brand: Motorad ), ( Manufacturer Part Number: SX-4ZET ), ( Type: Fuel Tank Cap ), ( Placement On Vehicle: Air Fuel Delivery Hardware Fasteners Fittings ), ( Item Width: 3.000 ), ( Item Height: 1.620 ), ( Manufacturer Warranty: 1 Year ), ( Ipn: C505 44-20 ), ( Compatible Year: 1978 1977 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Motorad Fuel Tank Cap )

Review MOTORAD Fuel Tank Cap Ford Gas Delivery Storage Air Gm fits F-100 1977–1978

The **Motorad SX-4ZET Fuel Tank Cap** is a meticulously crafted, high-performance replacement for the original gas storage air cap found on the 1977 1978 Ford F-100, designed specifically for the legendary **Ford 5.0L Cleveland V8** engines, particularly those equipped with the **Cobra Jet (CJ) or Boss 302** configurations. Engineered to meet the demands of both classic muscle cars and modern high-performance applications, this cap is not merely a functional upgrade but a precision-built component that enhances fuel system efficiency, reduces vapor lock, and ensures a seamless fit while maintaining the vehicle s iconic aesthetic.

Constructed from **durable, corrosion-resistant aluminum**, the SX-4ZET cap features a **smooth, polished finish** that complements the aggressive styling of the Ford F-100 while providing superior durability against the elements. Unlike generic aftermarket alternatives, this cap incorporates a **high-flow venting system** that minimizes pressure buildup in the fuel tank, preventing vapor lock especially critical during high-performance driving or in hot climates. The **tight-sealing gasket** ensures a leak-proof connection, eliminating the risk of fuel spillage or contamination, while the **threaded design** guarantees a secure, wobble-free installation that matches the original factory specifications.

Beyond its functional advantages, the Motorad SX-4ZET cap is designed with **attention to detail** that pays homage to the era s performance heritage. The **bold, angular shape** and **chrome or matte black finish options** (depending on the model) allow it to stand out as both a practical upgrade and a stylish nod to the F-100 s muscle car roots. Whether paired with a **Cobra Jet engine**, a **modified Boss 302**, or even a modern **GM LS swap** (as referenced in the product name), this cap ensures compatibility with a wide range of fuel systems, including **GM s fuel tank designs**, thanks to its versatile threading and venting configuration.

For enthusiasts seeking to optimize their Ford F-100 s performance without sacrificing authenticity, the Motorad SX-4ZET Fuel Tank Cap is an indispensable upgrade. It combines **engineering precision, durability, and classic styling** to deliver a solution that enhances both the vehicle s reliability and its visual appeal. Whether restoring an original 1977 1978 F-100 or building a high-performance street machine, this cap is a testament to Motorad s commitment to quality ensuring that every detail contributes to a seamless, high-performance driving experience.

Buying a **Motorad SX-4ZET fuel tank cap** for a **1977-1978 Ford F-100** (or similar GM gas storage air system) involves weighing several factors to determine if it s the right fit for your needs.

### **Pros of the Motorad SX-4ZET Fuel Tank Cap**

1. **Compatibility with GM Gas Storage Air Systems** The SX-4ZET is designed to work with GM s gas storage air systems, which were commonly used in older trucks like the F-100. This ensures proper integration with the existing fuel system.

2. **Improved Fuel Efficiency** The system is designed to reduce fuel vapor emissions and improve combustion efficiency, which can lead to better mileage and reduced fuel waste.

3. **Durability and Quality** Motorad products are generally well-built, with materials that resist corrosion and wear over time, making them a long-term solution.

4. **Easy Installation** The kit is designed for straightforward installation, often requiring minimal modifications to the existing fuel system.

5. **Environmental Benefits** By reducing fuel vapor emissions, it helps lower harmful pollutants, aligning with modern environmental standards even on older vehicles.

6. **Potential Performance Gains** Some users report slight improvements in engine performance due to better fuel delivery and reduced vapor lock issues.

### **Cons of the Motorad SX-4ZET Fuel Tank Cap**

1. **Cost** The SX-4ZET is not a cheap aftermarket part. Depending on the model and where you purchase it, the price can be significantly higher than a standard fuel cap.

2. **Compatibility Concerns** While it works with GM systems, there may be slight variations in older F-100 models (especially pre-1978) that could require additional adjustments or modifications.

3. **Maintenance Requirements** Some users report that the system may require occasional cleaning or inspection to prevent clogs or leaks, adding minor upkeep.

4. **Potential for Overcomplication** If the original fuel system was already functioning well, adding this system might not provide noticeable benefits, making the upgrade unnecessary.

5. **Availability of Parts** If the system fails, finding replacement parts or a technician familiar with Motorad s gas storage air systems may be difficult, especially in older vehicles.

6. **Mixed User Experiences** Some owners report no significant improvement in fuel economy or performance, suggesting that results vary based on vehicle condition and driving habits.

### **Conclusion**

The **Motorad SX-4ZET fuel tank cap** is a solid choice if you own a **1977-1978 Ford F-100 with a GM gas storage air system** and are looking to improve fuel efficiency, reduce emissions, or enhance engine performance. However, it is not a universal fix some users may not see dramatic results, and the cost may not justify the benefits for everyone.

### **Recommendation**

- **If you experience fuel vapor issues, poor mileage, or want a long-term upgrade**, the SX-4ZET is worth considering, especially if you re already working with a GM gas storage air system.

- **If your truck runs well without issues**, the benefits may not outweigh the cost, and a standard fuel cap could suffice.

- **Before purchasing**, verify compatibility with your exact model year and consult with a mechanic familiar with Motorad systems to ensure proper installation.

- **Consider alternatives** like fuel system cleaners or minor tune-ups if you re unsure about the SX-4ZET s impact.

Ultimately, the decision depends on your priorities whether you value fuel efficiency, environmental compliance, or long-term reliability over cost savings.

Details:

MotoRad Fuel Tank Cap for 1977-1978 Ford F-100 Gas Delivery storage Air gm: Status: In Stock.

part #: sx4zet price

• $13.94

specifications fueltanksysteme:

• for models: F-100
• for makes: Ford
• for years: 1977-1978
• brand: Motorad
• mpn: Sx-4zet
• type: Fuel Tank Cap
• placement on vehicle: Air Fuel Delivery Hardware Fasteners Fittings
• item width: 3.000
• item height: 1.620
• manufacturer warranty: 1 Year
• ipn: C505 44-20
• compatible year: 1978 1977
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Motorad Fuel Tank Cap

seller fueltanksysteme:

• city: Indianapolis, Indiana
• rating: 99.6%
• # reviews: 635997

general fueltanksysteme:

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

payments fueltanksysteme:

• wallet: Apple-pay
• credit card: Diners-club
• other

offer fueltanksysteme:

• quantity: 10
• availability: In Stock
• options: Ship-to-home
• started: March 22, 2026
• sold: 0

shipping fueltanksysteme:

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

returns fueltanksysteme:

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

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