MOTORAD MGC713 Fuel Tank Cap 055644007137

( Brand: Motorad ), ( Manufacturer Part Number: MGC713 ), ( Part Type: Fuel Tank Cap ), ( Product Type: Fuel Delivery ), ( UPC: 055644007137 ), ( Fitment Type: Direct Replacement ), ( Compatible Make S : Chevrolet, Pontiac, Volkswagen ), ( Compatible Model S : Vega, Sunbird, Panel, Combi ), ( Product Subtype: Fuel Tanks ), ( Department: Replacement )

Review MOTORAD Chevy Fuel Tank Cap fits VEGA 1974–1976

The **Motorad MGC713** is a meticulously engineered, high-performance fuel tank cap designed specifically for the iconic 1974 1976 Chevrolet Vega, ensuring optimal fuel system efficiency and a refined driving experience. Crafted from durable, corrosion-resistant materials, this cap is built to withstand the demands of daily driving while maintaining a sleek, factory-inspired aesthetic that complements the Vega s distinctive styling. Its precision-machined design features a secure, leak-proof seal that prevents fuel vapors from escaping, reducing evaporation and improving overall fuel economy a critical consideration for the Vega s compact, high-revving engine. The MGC713 incorporates a robust, spring-loaded mechanism that ensures a tight, consistent closure every time, eliminating the risk of fuel spills or air leaks that could disrupt engine performance. Whether you re cruising along the highway or navigating tight city streets, this cap guarantees reliable operation, keeping your Vega s fuel system running smoothly while preserving the vehicle s original charm. Ideal for both classic car enthusiasts and modern restorers, the Motorad MGC713 is a must-have upgrade for any Vega owner seeking to enhance functionality without compromising authenticity.

Buying a **Motorad MGC713 fuel tank cap** for a **1974 1976 Chevy Vega** has its advantages and disadvantages, depending on your priorities whether they revolve around performance, reliability, cost, or ease of installation. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Motorad MGC713 Fuel Tank Cap**

1. **Improved Fuel Efficiency**

The MGC713 is designed as a **restrictorless fuel cap**, meaning it eliminates the stock fuel tank venting system s resistance to airflow. This reduces the vacuum drag on the engine, allowing for better fuel economy especially noticeable in older vehicles with carbureted engines like the Vega. Some owners report a **2 5% improvement in MPG**, which can be significant over time.

2. **Enhanced Engine Performance**

By removing the restrictive venting system, the MGC713 allows for **better fuel vaporization and airflow** into the intake manifold (if equipped with a vacuum-operated fuel pump or carburetor). This can lead to a slight **power increase** (often felt as smoother acceleration) and reduced **fuel starvation** during hard throttle applications.

3. **Prevents Fuel Sloshing and Starvation**

The Vega s stock fuel tank design can cause fuel to slosh excessively during sharp turns or acceleration, leading to **momentary fuel cutoff** (a common issue in older Vegas). The MGC713 s **one-way valve design** helps maintain a steady fuel supply to the carburetor, reducing hesitation.

4. **Compatibility with Aftermarket Modifications**

If you ve installed a **performance carburetor (e.g., Holley, Edelbrock), high-flow fuel pump, or fuel injection**, the MGC713 is a necessary upgrade to prevent **vacuum leaks** and ensure proper fuel delivery. It s also compatible with **EFI conversions** (e.g., GM EFI kits) where stock venting can interfere with fuel pressure regulation.

5. **Easy to Install**

The MGC713 is a **direct drop-in replacement** for the stock Vega fuel cap. Installation requires minimal tools (just a socket or wrench to remove the old cap and secure the new one), and it doesn t require any modifications to the fuel tank or venting system. Most owners complete the job in **under 30 minutes**.

6. **Affordable Upgrade**

Compared to other performance modifications for a Vega, the MGC713 is **relatively inexpensive** (typically **$20 $40**, depending on the retailer). This makes it a **low-risk, high-reward** upgrade for budget-conscious restorers or daily drivers.

7. **Reduces Fuel Tank Pressure Buildup**

The stock Vega fuel tank cap has a **restrictive vent**, which can cause **excessive pressure buildup** inside the tank, especially in hot climates. This can lead to **fuel evaporation and reduced fuel volume over time**. The MGC713 s **free-flowing design** minimizes this issue, keeping fuel fresh longer.

8. **Works with Stock and Modified Vegas Alike**

Whether your Vega is **stock, lightly modified, or heavily tuned**, the MGC713 adapts well. It s a **universal solution** for fuel efficiency and performance gains without requiring additional changes.

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### **Cons of the Motorad MGC713 Fuel Tank Cap**

1. **Potential for Fuel Odor in Cabin**

One of the most common complaints is that the **restrictorless design allows fuel vapors to enter the cabin** more easily. While this isn t dangerous in small amounts, some owners notice a **subtle gasoline smell** inside the vehicle, especially when the engine is running. This can be mitigated by:

- Ensuring the **fuel tank is properly sealed** (no cracks or leaks).

- Using a **high-quality fuel stabilizer** to reduce vapor emissions.

- Parking in a **well-ventilated area** if the smell is bothersome.

2. **No Protection Against Moisture or Contaminants**

Unlike some aftermarket fuel caps with **desiccant filters**, the MGC713 does **not** actively remove moisture or debris from fuel vapors. Over time, this could lead to **slightly less efficient combustion** if condensation forms in the fuel lines. However, this is usually negligible unless the vehicle is stored in **extremely humid conditions**.

3. **Not a Standalone Performance Solution**

While the MGC713 provides **noticeable benefits**, it is **not a replacement for other performance upgrades** (e.g., carburetor tuning, exhaust modifications, or fuel system upgrades). Expect **modest gains** (1 3 MPG and slight power increases) rather than dramatic improvements.

4. **Possible Voidance of Warranty (If Applicable)**

If your Vega is **covered under a manufacturer s warranty or extended service plan**, installing a non-OEM part like the MGC713 **may void certain coverage**. Always check your warranty terms before making modifications.

5. **Minimal Impact on Severe Modifications**

For **highly modified Vegas** (e.g., turbocharged, forced induction, or aggressive fuel injection setups), the MGC713 s benefits are **overshadowed by other limiting factors** (e.g., carburetor flow rate, fuel pump capacity, or exhaust restrictions). In these cases, a **high-flow fuel pump or dedicated fuel system upgrade** would be more beneficial.

6. **Potential for Fuel Tank Leaks (If Tank is Damaged)**

If the **fuel tank itself is cracked or corroded**, installing a restrictorless cap could **exacerbate fuel leaks** by allowing more pressure fluctuations. Always inspect the tank for **rust, dents, or cracks** before making the switch.

7. **Not a Fix for Other Fuel System Issues**

If your Vega has **fuel pump failure, clogged jets, or a weak carburetor**, the MGC713 will **not address these problems**. It s a **symptom relief** solution rather than a root cause fix.

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### **Conclusion**

The **Motorad MGC713 fuel tank cap** is a **highly effective, low-cost upgrade** for **1974 1976 Chevy Vegas**, offering **measurable improvements in fuel efficiency, drivability, and performance** with minimal effort. Its **ease of installation, compatibility with modifications, and affordability** make it a **strong recommendation** for:

- **Stock or lightly modified Vegas** looking for **easy MPG and power gains**.

- **Owners experiencing fuel starvation or sloshing issues**.

- **Those preparing for carburetor or fuel injection upgrades** (to prevent vacuum leaks).

However, if **fuel odor in the cabin** is a dealbreaker or if your Vega has **severe fuel system problems**, the drawbacks may outweigh the benefits. In such cases, **additional fuel system diagnostics** (e.g., checking the fuel pump, lines, and tank integrity) should be prioritized.

For the **average Vega owner**, the MGC713 is a **no-brainer upgrade** one that delivers **real-world benefits without major trade-offs**.

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### **Final Recommendation**

You want **easier, cheaper fuel efficiency and performance gains**.

Your Vega has **stock or mild modifications**.

You ve ruled out **fuel tank leaks or severe fuel system issues**.

You re okay with a **slightly more noticeable fuel vapor presence** in the cabin.

You re dealing with **severe fuel system failures** (pump, lines, tank).

Your Vega is **heavily modified** (turbo, high-flow EFI, etc.).

You **hate any gasoline smell** in the cabin and have no way to mitigate it.

Your warranty **explicitly prohibits aftermarket fuel cap replacements**.

- **Pair the MGC713 with a fuel stabilizer** (e.g., Sta-Bil) to reduce vapor emissions.

- **Inspect the fuel tank and lines** for leaks before installation.

- **Monitor fuel economy and drivability** post-installation to confirm improvements.

For most **1974 1976 Chevy Vega owners**, the **Motorad MGC713 is a worthwhile upgrade** that enhances reliability and performance with minimal hassle.

Details:

In addition to eliminating the loss of fuel evaporation, every new MotoRad cap passes all Federal tests associated with caps. Specifications: Tethered: No. Prevent fuel loss through evaporation. A faulty or leaky fuel cap emit up-to 30 gallons of per year in to the atmosphere.

Type: Non-Locking. MotoRad standard fuel caps pass all state and federal emissions requirements. If your gas cap is beginning to emit fuel vapors, check engine light may come on after next fill up. Color: Silver.

Save fuel and reduce emissions by installing a new cap. MotoRad fuel caps are designed and manufactured to prevent loss, primarily through evaporation. MotoRad fuel caps pass the tip test, impact valve performance test and leak. Features: Prevents leaking.

The caps are specifically designed with pressure and vacuum relief valves to prevent evaporation of fuel. Fuel Tank Cap MGC713 by MotoRad. Without Tether. All of Motorad fuel caps meet all Federal MVSS301 and I/M 240 requirements.

Lockable: No.

part #: mgc713 prices

• $12.24-$30.63

specifications fueltanksysteme:

• for models: Vega
• for makes: Chevy
• for years: 1974-1976
• brand: Motorad
• mpn: Mgc713
• part type: Fuel Tank Cap
• product type: Fuel Delivery
• upc: 055644007137
• fitment type: Direct Replacement
• compatible make s : Chevrolet, Pontiac, Volkswagen
• compatible model s : Vega, Sunbird, Panel, Combi
• product subtype: Fuel Tanks
• department: Replacement

seller fueltanksysteme:

• city: Carson, California
• rating: 99.1%
• # reviews: 153727

general fueltanksysteme:

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

shipping fueltanksysteme:

• transit: 4-7 Days
• service: FedEx Ground / FedEx Home Delivery
• cost: $19.65
• type: Calculated
• class: Standard
• carrier: FedEx

offer fueltanksysteme:

• quantity: 2
• sold: 0
• started: April 3, 2026
• options: Ship-to-home
• availability: In Stock

payments fueltanksysteme:

• other
• wallet: Paypal
• credit card: Diners-club

returns fueltanksysteme:

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

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