MOTORAD SX-3FBX Fuel Tank Gas Cap Calais Storage Air

( Brand: Motorad ), ( Manufacturer Part Number: SX-3FBX ), ( 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: C693 32-50 ), ( Compatible Model: Calais ), ( Compatible Year: 1976 1975 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Motorad Fuel Tank Cap )

Review MOTORAD Fuel Tank Cap Cadillac Calais Gas Delivery Storage Air Lm fits 1975–1976

The **Motorad SX-3FBX Fuel Tank Cap** is a meticulously crafted, high-performance replacement part designed specifically for the 1975 1976 Cadillac Calais, ensuring both functionality and aesthetic precision for this iconic American muscle car. Engineered from durable, corrosion-resistant materials, this fuel cap is built to withstand the rigors of daily driving while maintaining a sleek, vintage-inspired appearance that complements the Calais s classic design. The cap features a secure, dual-lip sealing mechanism that prevents fuel vapors from escaping, reducing evaporation and ensuring optimal fuel efficiency a critical consideration for enthusiasts who appreciate both performance and longevity. Its polished, chrome-plated finish not only enhances the car s visual appeal but also resists tarnishing, guaranteeing a showroom-worthy look for years to come. The cap s ergonomic design allows for easy installation and removal, with a smooth, well-balanced grip that makes refueling effortless, even in tight or awkward positions. Beyond its practical benefits, the Motorad SX-3FBX is a meticulously reverse-engineered replica of the original Cadillac components, ensuring an exact fit with the fuel tank s mounting points and alignment. Whether restoring a classic Calais to its former glory or maintaining a cherished collector s vehicle, this fuel cap delivers the perfect blend of authenticity, durability, and performance, making it an essential upgrade for any serious enthusiast.

Buying a replacement **Motorad SX-3FBX fuel tank cap** for a **1975-1976 Cadillac Calais** (specifically for the gas storage/air vent system) involves weighing several factors. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

---

### **Pros of buying a Motorad SX-3FBX Fuel Tank Cap**

1. **Compatibility and Fit**

The Motorad SX-3FBX is designed as a direct replacement for the original fuel tank cap on the Calais, including the air venting system. This ensures proper sealing and functionality, preventing fuel vapor leaks or improper venting, which could lead to fuel system issues or even emissions problems.

2. **Durability and Quality Materials**

Motorad products are known for using high-quality materials, including sturdy plastic and reliable sealing mechanisms. The cap is built to withstand regular use, reducing the risk of wear or failure over time. The metal or reinforced plastic components help resist cracking or deformation.

3. **Proper Venting Functionality**

The original fuel tank cap on the Calais included an air vent to allow pressure equalization inside the tank. The SX-3FBX cap maintains this feature, ensuring that fuel expands and contracts properly without damaging the tank or creating a vacuum that could siphon fuel out of the tank.

4. **Easy Installation**

The cap is designed to fit standard fuel tank openings, and Motorad provides clear instructions. Most owners can install it without specialized tools, though some may need to clean the tank opening thoroughly to ensure a proper seal.

5. **Prevents Fuel Evaporation and Contamination**

A well-sealing cap reduces fuel evaporation, keeping the tank fuller for longer trips. It also prevents dust, debris, or moisture from entering the tank, which could contaminate the fuel or clog the vent system.

6. **Maintains Emissions Compliance**

The venting system in the cap helps meet emissions standards by allowing fuel vapors to escape safely rather than building up pressure inside the tank. This is particularly important for older vehicles that may not have modern fuel system components.

7. **Aftermarket Support and Availability**

Motorad is a reputable brand with a long history in the automotive aftermarket. The SX-3FBX cap is widely available through online retailers, specialty auto parts stores, and sometimes directly from Motorad. This makes it easier to find and purchase compared to OEM parts, which may be harder to locate for older vehicles.

8. **Cost-Effective Solution**

While not the cheapest option, the SX-3FBX cap is often more affordable than ordering an original equipment manufacturer (OEM) part, which could be discontinued or require sourcing from a junkyard. The price typically reflects its quality and compatibility.

---

### **Cons of buying a Motorad SX-3FBX Fuel Tank Cap**

1. **Potential Incompatibility with Modifications**

If the original fuel tank or venting system has been altered (e.g., modified for larger tanks, fuel injection changes, or custom venting), the SX-3FBX cap may not function optimally. Always verify that the cap matches the intended application, including any aftermarket modifications.

2. **Limited Customization**

Unlike some aftermarket parts, fuel tank caps are generally standardized for their application. The SX-3FBX cap is not customizable in terms of color, material, or venting specifications, which may be a drawback for owners seeking aesthetic or performance-specific options.

3. **Installation Challenges**

While the cap is designed for easy installation, some owners may encounter difficulties if the fuel tank opening is corroded, misaligned, or obstructed. Cleaning the area thoroughly and ensuring a proper seal is critical; failure to do so could lead to leaks or improper venting.

4. **Price Relative to OEM**

Although the SX-3FBX cap is often cheaper than an OEM replacement, it may still be more expensive than generic or no-name alternatives. For budget-conscious buyers, this could be a consideration, though the trade-off in quality may not be worth it.

5. **Availability of Alternatives**

There are other aftermarket brands that produce fuel tank caps for the Calais, such as **Delco Remy** or **ACDelco**. While Motorad is reliable, comparing prices and reviews of alternatives may reveal a better option depending on specific needs.

6. **Potential for Counterfeit Products**

Purchasing from unverified sellers (especially online marketplaces) could result in counterfeit or low-quality replicas. Always buy from authorized dealers or reputable retailers to ensure authenticity and quality.

7. **Venting System Reliability Over Time**

While the SX-3FBX cap is durable, the venting mechanism could become clogged with debris over time, especially if the fuel tank is not cleaned regularly. This may require periodic maintenance to ensure the vent remains clear.

8. **Limited Warranty or Return Options**

Some aftermarket parts come with limited warranties or no return policies. Motorad typically offers a warranty, but it s important to review the terms before purchasing to understand coverage and return options.

---

### **Conclusion**

The **Motorad SX-3FBX fuel tank cap** is a strong choice for owners of a **1975-1976 Cadillac Calais** seeking a reliable, compatible, and durable replacement for their original fuel tank cap. Its primary advantages lie in its **proper venting functionality, durability, and ease of installation**, which are critical for maintaining the vehicle s fuel system integrity and emissions compliance. The cap addresses common issues associated with older fuel tanks, such as leaks, improper venting, and contamination.

However, potential drawbacks include **limited customization, the need for careful installation, and the possibility of encountering counterfeit products**. For most owners, the benefits outweigh these cons, especially when purchasing from a trusted source. The cap is a practical investment that ensures long-term reliability for the vehicle s fuel system.

---

### **Recommendation**

For a **1975-1976 Cadillac Calais**, the **Motorad SX-3FBX fuel tank cap** is **highly recommended** as the best aftermarket replacement option. Here s why:

- **Prioritize quality and compatibility** over cost savings, as a poorly sealing or improperly venting cap can lead to fuel system issues or emissions problems.

- **Purchase from an authorized dealer or a reputable online retailer** (e.g., RockAuto, Summit Racing, or Motorad s official website) to avoid counterfeit products.

- **Inspect the fuel tank opening** before installation to ensure it is clean and free of debris. Use a mild detergent and water to clean the area if necessary.

- **Follow installation instructions carefully**, ensuring the cap is seated properly and the venting mechanism is clear.

- **Consider pairing the cap with a fuel tank cleaner** if the tank has been neglected, as residual debris could clog the vent over time.

If budget is a concern, compare the SX-3FBX with other reputable brands like **Delco Remy** or **ACDelco** to ensure you re getting the best value. However, given Motorad s reputation for quality and compatibility, the SX-3FBX cap is the **best overall choice** for this application.

Details:

MotoRad Fuel Tank Cap for 1975-1976 Cadillac Calais Gas Delivery storage Air lm: Status: In Stock.

part #: sx3fbx prices

• $18.57-$24.00

specifications fueltanksysteme:

• for makes: Cadillac
• for years: 1975-1976
• brand: Motorad
• mpn: Sx-3fbx
• 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: C693 32-50
• compatible model: Calais
• compatible year: 1976 1975
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Motorad Fuel Tank Cap

seller fueltanksysteme:

• rating: 99.6%
• # reviews: 646697
• city: Indianapolis, Indiana

returns fueltanksysteme:

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

payments fueltanksysteme:

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

shipping fueltanksysteme:

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

offer fueltanksysteme:

• sold: 0
• options: Ship-to-home
• started: April 18, 2026
• quantity: 10
• availability: In Stock

general fueltanksysteme:

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

Motorad SX-3FBX Is Similar To:

• 2003-11 Motorad Heavy Duty Fuel Cap Nonlocking Un Thread 055644804125 (30.8% similar) Motorad part number our choice. Once purchased you own it. Or any other minor issue that does not make the part you are buying defective. Sometimes the fitment is so old that it does not take into account trim, engine size or build dates. Shipping:free shipping is for continental USA only. If any ...(November 3rd, 2018)
• 2504-11 Motorad Heavy Duty Fuel Cap With Lock (33.3% similar) Motorad heavy duty fuel cap with lock. This is new in open box...(April 4th, 2018)
• Mgc-793sk Motorad Dual Locking Fuel Cap Tanks Air Intake 055644107936 (32.1% similar) Motorad MGC-793SK dual locking fuel cap protects your from theft and vandalism passes all state federal emissions tests manufactured durable, long-life materials reduces air pollution with proper sealing venting independently tested for emission control deters vandalism. Specifically designed ...(June 16th, 2018)
• Mgc-807 Cst Motorad Mgc807 Fuel 055644008073 (24.4% similar) CST Motorad MGC807 fuel tank cap thumbnails to caps are designed and manufactured prevent loss, primarily through evaporation. Please through the messaging system by ing button above. Combining a inventory and showrooms full of parts provides us the advantage shipping products quickly efficiently. A...(January 23rd, 2018)
• Mgc-811 Cst Motorad Mgc811 Fuel 055644008110 (24.4% similar) Our product offering includes every conceivable trailer, tire, towing device, truck accessory, suspension, exhaust, lighting, and performance part. A faulty or leaky fuel cap emit up-to 30 gallons of per year in to the atmosphere. All of Motorad fuel caps meet federal MVSS301 and I m 240 ...(February 22nd, 2018)
• Mgc 832 Wd Express Motorad Fuel Tank Cap Fits Jaguar Vanden (41.1% similar) ...(October 27th, 2018)
• Mgc-837 Motorad Fuel Tank Cap Upc 055644008370 (36.1% similar) CHRYSLER1999-2017DODGE1999-2017FIAT2012--2017INFINI 002-2011JEEP2000-2017KIA2005-2017MAZDA2003-2015MERCEDES-BENZ2006-2017MITSUBISHI2001-2017NISSAN2000-2013PLYMOUTH1999-2001RAM2011-2017SUBARU2005-2017SUZUKI2009-2011VOLKSWAGEN2009-2014...(January 18th, 2019)
• Mgc46 Motorad Fuel Gas Tank Filler Cap Replace Oem (40.9% similar) Motorad MGC-46STANDARD fuel cap tank verify fitment before purchase...(April 18th, 2018)
• Mgc48 Motorad Pronto Fuel Tank Fits Pickup Suburban (40.6% similar) No other accessories included. See photos above. Fast shipping. Receive only what is pictured listed. Comes as shown...(February 17th, 2019)
• Mgc519 Motorad Push Vent Fuel Tank Cap Fits Volvo 055644115191 (38.9% similar) Manufactured to pass all state and federal emissions requirements. Specifically designed pressure and vacuum relief valves to prevent evaporation of fuel. and we urge you to take a look if cannot find what are looking for at egghead. Orders ship from 12 major metropolitan markets in the us. A ...(June 5th, 2019)
• Mgc637t Motorad Fuel Cap (28.8% similar) ...(January 1st, 2019)