SPEEDWAY MOTORS 91018012 Rubber Motor Mounts Block Big 4.3L V6/ Block/ V8

( Brand: Speedway Motors ), ( Manufacturer Part Number: 91018012 ), ( Type: Motor Mounts ), ( Item Length: 6.20 ), ( Item Width: 4.600 ), ( Item Height: 3.400 ), ( California Prop 65 Warning: True )

Review SPEEDWAY MOTORS Rubber Motor Mounts Chevy 4.3l V6/ Small Block/ Big Block V8

The **Speedway 91018012 Rubber Motor Mounts** are a premium, high-performance replacement designed to enhance the durability, stability, and drivability of your Chevy 4.3L V6 or Big Block V8 engine applications. Engineered with a robust **high-quality rubber compound**, these mounts are built to withstand the rigors of heavy-duty use, providing superior shock absorption and vibration damping compared to standard OEM or aftermarket alternatives. The **precision-molded rubber** ensures a tight, secure fit while minimizing engine movement, reducing stress on critical components like the engine block, transmission, and firewall mounts. Whether you're tackling rough roads, towing heavy loads, or pushing your vehicle to its limits in performance driving, these mounts deliver exceptional resilience and longevity. The **reinforced steel inserts** within the rubber compound prevent deformation under extreme loads, maintaining structural integrity even under high-stress conditions. Installation is straightforward, thanks to the **universal compatibility** with Chevy s 4.3L V6 and Big Block V8 applications, making them an ideal choice for both restoration projects and high-mileage vehicles. With a focus on **durability, performance, and reliability**, Speedway s 91018012 motor mounts are a trusted upgrade for enthusiasts and professionals seeking to eliminate engine bounce, improve ride quality, and extend the life of their drivetrain.

**Pros and Cons of Buying Speedway 91018012 Rubber Motor Mounts for Chevy 4.3L V6/Block/Big Block V8**

1. **Compatibility** These mounts are designed specifically for Chevy engines, including the 4.3L V6 (e.g., in the S10, Blazer, or GMC trucks) and big block V8 applications. The part number suggests broad applicability, which can reduce the risk of purchasing a wrong fitment.

2. **Durability** Speedway is a well-known brand in the aftermarket performance and replacement parts industry. Their rubber mounts are typically built to withstand heavy engine loads, reducing the risk of premature failure compared to cheaper, lower-quality alternatives.

3. **Noise and Vibration Reduction** Proper motor mounts help isolate engine vibrations, improving cabin comfort and reducing road noise. High-quality rubber mounts can also prevent excessive movement, which may lead to driveline issues or damage to surrounding components.

4. **Ease of Installation** Many Speedway parts are designed with standard installation procedures in mind, often requiring only basic tools. The mounts come pre-assembled with mounting hardware, simplifying the replacement process.

5. **Performance Benefits** For older vehicles with worn or failing stock mounts, replacing them with new rubber mounts can improve engine stability, especially under acceleration or at higher RPMs. This can lead to better drivability and longevity for the engine bay components.

6. **Warranty and Support** Speedway offers warranties on many of its products, providing some assurance against defects. Their customer service is generally reliable for returns or replacements if issues arise.

7. **Cost-Effective Alternative** While not the cheapest option, these mounts are often more affordable than premium brands like Melling or Bilstein, offering a balance between quality and price.

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1. **Potential Fitment Issues** Despite the broad compatibility, there may be slight variations in mounting patterns or bolt spacing depending on the specific engine application (e.g., 4.3L V6 vs. big block V8). Always verify the exact fitment for your vehicle s year, model, and engine configuration to avoid mismatches.

2. **Quality Variability** While Speedway is reputable, the quality of rubber mounts can vary by batch. Some users report that cheaper rubber compounds may degrade faster under extreme heat or heavy loads, especially in high-performance or towing applications.

3. **Installation Challenges** In some cases, particularly with older vehicles or tight engine bays, accessing and installing the mounts can be difficult. Additional tools or modifications (e.g., removing panels or brackets) may be required, adding time and labor costs.

4. **Limited Customization** These are standard rubber mounts and do not offer adjustable or high-performance alternatives (e.g., polyurethane or metal bushings) that might be needed for aggressive driving or heavy-duty use.

5. **Resale Value Impact** While replacing worn mounts improves drivability, it does not significantly enhance the vehicle s resale value. The investment is primarily for performance and reliability rather than aesthetics or market appeal.

6. **Potential for Counterfeit Products** Purchasing from unauthorized sellers (e.g., third-party marketplaces) may result in counterfeit or substandard parts. Always buy from reputable dealers or authorized Speedway distributors to ensure authenticity.

7. **Maintenance Requirements** Rubber mounts can degrade over time due to exposure to oil, heat, and road debris. They may need periodic inspection and replacement, especially in high-mileage or harsh environments.

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The **Speedway 91018012 rubber motor mounts** are a solid choice for Chevy 4.3L V6 and big block V8 applications, offering a balance of compatibility, durability, and affordability. They address common issues like vibration, noise, and engine stability while being easier to install than some high-end alternatives. However, potential buyers should verify exact fitment, consider the vehicle s specific use case (e.g., towing, performance driving), and purchase from trusted sources to avoid quality issues.

For **stock or light-duty use**, these mounts are an excellent replacement option. For **heavy-duty, high-performance, or extreme conditions**, upgrading to polyurethane or metal bushings (e.g., Melling or Bilstein) may be warranted despite the higher cost.

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- Your vehicle has worn or failing stock mounts causing excessive vibration or noise.

- You need a reliable, budget-friendly replacement for daily driving or light towing.

- You ve confirmed the exact fitment matches your engine and application.

- You engage in aggressive driving, racing, or heavy towing, where polyurethane or metal bushings offer better durability.

- Your engine bay has tight clearance, and you re unsure about installation ease.

- You prefer premium brands with extended warranties (e.g., Melling, Bilstein, or PU Products).

- Authorized Speedway dealers, reputable auto parts stores (e.g., RockAuto, Summit Racing), or the official Speedway website to ensure authenticity and warranty coverage.

For most owners seeking a straightforward, cost-effective solution, these mounts are a **strong recommendation**. However, always prioritize fitment verification and quality sourcing to maximize their effectiveness.

Details:

Ensures maximum life and performance. These were so much easier to install w/ the horizontal through-bolt than original style. Yes, I recommend this product. Application-specific Barometer hardness based on engine weight torque.

Part # 91018012 Sold in Quantity Pair Notes to refers engine bolt pattern. These Chevy motor mounts fit small and big block engines as well 4.3L V6. Part # 91018012 Condition New Brand Speedway Motors Sold Pair Details These 3-bolt S/B Chevy rubber motor mounts are manufactured to meet or exceed OEM specifications. Fits most 1958-73 Chevy passenger cars with small block V8.

Unique rubber formula provides good abrasion resistance and aging stability. Sold as a pair. Special Hemlock bonding agent ensures superior rubber-to-metal bond. Headquarters.

part #: 91018012 prices

• $55.99-$73.99

specifications engimou:

• for makes: Chevy
• brand: Speedway Motors
• mpn: 91018012
• type: Motor Mounts
• item length: 6.20
• item width: 4.600
• item height: 3.400
• california prop 65 warning: True

shipping engimou:

• type: Fixed
• service: Expedited
• class: Expedited
• cost: $13.99
• transit: 4-6 Days

seller engimou:

• city: Lincoln, NE
• rating: 99.8%
• # reviews: 366455

payments engimou:

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

returns engimou:

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

offer engimou:

• started: May 23, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock

general engimou:

• Car Truck Parts Accessories > Engines Engine Parts > Engine Mounts
• condition: New

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