MOTORAD SX-FE18 Fuel Tank Cap Yp 5.7L 6.2L 7.4L

( Brand: Motorad ), ( Manufacturer Part Number: SX-FE18 ), ( Type: Fuel Tank Cap ), ( Placement On Vehicle: Air Fuel Delivery Hardware Fasteners Fittings ), ( Item Width: 3.500 ), ( Item Length: 5.250 ), ( Manufacturer Warranty: 1 Year ), ( Ipn: C772 10-64 ), ( Compatible Model: R2500 Suburban ), ( Compatible Year: 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 Chevrolet 5.7l 6.2l 7.4l Yp fits SUBURBAN R2500 1989–1991

The **Motorad SX-FE18 Fuel Tank Cap** is a meticulously crafted, high-performance replacement for the stock fuel filler cap on 1989 through 1991 Chevrolet R2500 Suburban models equipped with the legendary **5.7L (350 CID) V8, 6.2L (375 CID) V8, or 7.4L (454 CID) V8 engines** from the Y-body platform. Designed with both functionality and aesthetics in mind, this premium fuel cap is engineered to enhance fuel system efficiency while delivering a sleek, modern upgrade that instantly elevates the truck s appearance. Constructed from **durable, corrosion-resistant materials**, the SX-FE18 features a **tight-sealing gasket** that ensures an airtight closure, preventing fuel vapors from escaping and maintaining optimal fuel pressure for improved engine performance. The cap s **ergonomic, easy-grip design** allows for effortless installation and removal, even in tight spaces, while its **low-profile, aerodynamic shape** minimizes drag and reduces the risk of snagging on the truck s body panels. Unlike generic aftermarket alternatives, the Motorad SX-FE18 is **precision-machined to match the exact dimensions and fitment** of the original factory cap, ensuring a seamless integration with the fuel filler neck and surrounding components. Whether you re restoring a classic Suburban or simply upgrading a well-loved workhorse, this fuel cap combines **reliability, performance, and a refined look** to complement the rugged yet timeless appeal of your Y-body Chevy. Built to withstand the demands of daily driving, off-road adventures, or long-haul towing, the Motorad SX-FE18 is the ideal choice for owners seeking a subtle yet meaningful enhancement to their vehicle s fuel system and overall presence.

### Pros and Cons of Buying a Motorad SX-FE18 Fuel Tank Cap for a 1989-1991 Chevrolet R2500 Suburban (5.7L, 6.2L, 7.4L V8)

1. **Improved Fuel Efficiency** The SX-FE18 is designed to optimize fuel vapor flow, which can enhance engine performance and slightly improve fuel economy by reducing vapor lock and ensuring a cleaner fuel-air mixture.

2. **Enhanced Engine Performance** By allowing better fuel vaporization and airflow, the cap can help prevent fuel starvation under high loads, especially in older vehicles with carburetors or less efficient fuel systems. This may result in smoother acceleration and reduced hesitation.

3. **Prevents Fuel Vapor Lock** Older fuel systems are prone to vapor lock, particularly in hot climates or during heavy loads. The SX-FE18 s design helps mitigate this issue by maintaining proper fuel pressure and preventing vapor buildup.

4. **Compatibility with Aftermarket Modifications** If you ve installed performance upgrades (e.g., cold air intake, performance carburetors, or fuel injectors), the SX-FE18 can help compensate for increased airflow demands, ensuring stable fuel delivery.

5. **Easy Installation** The part is designed to fit standard fuel tank caps, requiring minimal tools and time to install. It screws on like a regular cap but provides enhanced functionality.

6. **Cost-Effective Upgrade** Compared to more extensive fuel system modifications (e.g., fuel line upgrades, performance injectors), the SX-FE18 is a relatively inexpensive solution that can yield noticeable benefits.

7. **Durability** Motorad products are generally well-built and designed to withstand the rigors of daily use, especially in a truck like the R2500, which may encounter rough roads or heavy loads.

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1. **Mixed Results with Fuel-Injected Engines** While the SX-FE18 can benefit carbureted engines, modern fuel-injected vehicles (including some 1989-1991 Suburans with electronic fuel injection) may not see significant improvements. The cap s primary benefit is more relevant to older, less refined fuel systems.

2. **Minimal Impact on Severe Performance Mods** If your truck has extensive modifications (e.g., turbocharging, high-flow fuel pumps, or significant horsepower increases), the SX-FE18 alone may not be sufficient. Additional fuel system upgrades (e.g., upgraded injectors, fuel rail pressure regulators) would likely be needed.

3. **Potential for Overcomplication** Some drivers may find the concept of a "performance fuel cap" unnecessary if their vehicle runs reliably without issues. The benefits are incremental rather than dramatic.

4. **Compatibility Concerns** While the SX-FE18 is advertised for your specific Suburban models, ensure the fuel tank s venting system and overall fuel delivery setup are compatible. In rare cases, an incompatible cap could cause minor issues like slight fuel pressure fluctuations.

5. **No Guarantee of Fuel Economy Gains** While the cap *can* improve fuel efficiency in some cases, results vary based on the vehicle s condition, driving habits, and other factors. Expect modest improvements at best.

6. **Limited Longevity Benefits** The cap itself won t prevent fuel system degradation (e.g., clogged fuel lines, worn seals) but may help mitigate symptoms of an aging fuel system.

7. **Installation Risks (If Mismanaged)** If not installed correctly (e.g., overtightening or cross-threading), it could damage the fuel tank s venting system or the cap s sealing mechanism, leading to leaks or improper fuel pressure.

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The **Motorad SX-FE18 fuel tank cap** is a worthwhile upgrade for a **1989-1991 Chevrolet R2500 Suburban with a carbureted 5.7L, 6.2L, or 7.4L V8**, particularly if you notice symptoms of fuel vapor lock, rough idle, or reduced performance under load. It s a simple, low-cost modification that can provide noticeable improvements in smoothness and efficiency for older, less refined fuel systems.

For **fuel-injected models** (especially those with electronic fuel injection), the benefits may be minimal, and the upgrade could be considered unnecessary unless you re experiencing specific fuel delivery issues. If your truck is heavily modified or you re pushing it for high performance, the SX-FE18 should be paired with other fuel system upgrades for optimal results.

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- **If your Suburban has a carburetor or you suspect fuel vapor lock issues**, install the **Motorad SX-FE18** it s a quick, affordable fix that could make a tangible difference.

- **If your truck has fuel injection and runs well**, skip the upgrade unless you re troubleshooting persistent fuel delivery problems.

- **For heavily modified trucks**, treat this as a supplementary upgrade rather than a standalone solution. Pair it with other performance fuel system components if needed.

- **Always ensure proper installation** to avoid damaging the fuel tank s venting system. Follow the included instructions or consult a mechanic if unsure.

**Final Verdict:** A **solid, low-risk upgrade for carbureted Suburans** with potential benefits for fuel-injected models in specific cases. Worth considering if you re looking for a simple performance tweak.

Details:

MotoRad Fuel Tank Cap for 1989 - 1991 Chevrolet R2500 Suburban 5.7L 6.2L 7.4L yp: Status: In Stock.

part #: sxfe18 prices

• $18.82-$23.40

specifications fueltanksysteme:

• for models: R2500, Suburban
• for makes: Chevrolet
• for years: 1989-1991
• brand: Motorad
• mpn: Sx-fe18
• type: Fuel Tank Cap
• placement on vehicle: Air Fuel Delivery Hardware Fasteners Fittings
• item width: 3.500
• item length: 5.250
• manufacturer warranty: 1 Year
• ipn: C772 10-64
• compatible model: R2500 Suburban
• compatible year: 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

seller fueltanksysteme:

• city: Indianapolis, Indiana
• rating: 99.5%
• # reviews: 627871

general fueltanksysteme:

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

offer fueltanksysteme:

• sold: 0
• started: March 2, 2026
• quantity: 10
• availability: In Stock
• options: Ship-to-home

shipping fueltanksysteme:

• class: Standard, Expedited
• transit: 3-7 Days
• service: Standard, Expedited
• cost: $0.00
• type: Fixed

payments fueltanksysteme:

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

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