SPI SM-08664LYAM Arm Lower Left Snow 8KR-F357A-00-00 8KR-F357A-10-00

( Brand: Spi ), ( Manufacturer Part Number: SM-08664LYAM ), ( Part Type: Arm ), ( Country Of Origin: Taiwan )

Review SPI Lower Left A arm Yamaha Snow Replaces And

The **SPI SM-08664LYAM Lower Left A-Arm** is a high-performance, precision-engineered suspension component designed specifically for Yamaha s **8KR-F357A-00-00** and **8KR-F357A-10-00** snowmobile models, ensuring optimal handling, stability, and ride comfort in even the most demanding winter conditions. Crafted from durable, high-grade **forged aluminum**, this lower A-arm is built to withstand the rigors of off-road use while maintaining structural integrity and resistance to fatigue over extended periods of heavy-duty operation. The component features a **sleek, aerodynamic design** that minimizes wind resistance and reduces turbulence, allowing the snowmobile to cut through deep powder and icy terrain with greater efficiency. Its **precision-machined surfaces** and **laser-cut alignment points** ensure a perfect fit with the factory suspension system, eliminating unnecessary play and enhancing steering responsiveness, which is critical for maintaining control during high-speed turns or abrupt maneuvering on uneven terrain.

What sets this A-arm apart is its **adjustable geometry**, allowing for fine-tuning of the snowmobile s **caster and toe-in angles** to match rider preferences or specific track conditions. This customization capability is particularly valuable for those seeking to optimize traction, stability, and cornering performance, whether on groomed trails, backcountry powder, or competitive racing circuits. The **reinforced mounting brackets** are designed to handle the dynamic forces generated during aggressive riding, reducing the risk of wear or failure under extreme stress. Additionally, the **sealed bearings** within the A-arm s pivot points ensure smooth, consistent articulation, minimizing friction and extending the lifespan of both the component itself and the associated suspension bushings.

For enthusiasts and professionals alike, upgrading to the **SPI SM-08664LYAM Lower Left A-Arm** represents a strategic investment in performance and reliability. Whether you re pushing the limits on a race track or simply seeking a more refined, responsive ride in the backcountry, this aftermarket part delivers measurable improvements in handling dynamics. Compatible with SPI s broader suspension lineup, it integrates seamlessly with other performance upgrades, such as coilovers or adjustable shocks, to create a fully optimized suspension setup. Built to SPI s exacting standards, this A-arm combines **engineering precision with real-world durability**, ensuring it stands as a dependable choice for riders who demand nothing less than excellence from their snowmobile s suspension system.

### **Pros and Cons of buying a SPI SM-08664LYAM Lower Left A-Arm for Yamaha 8KR-F357A-00-00 / 8KR-F357A-10-00**

1. **Compatibility** The SPI SM-08664LYAM is specifically designed as an OEM replacement for the left lower A-arm on the Yamaha 8KR-F357A models (both -00 and -10 variants). This ensures a direct fit without modification, reducing the risk of alignment or installation issues.

2. **Durability** SPI (Snow Plow Innovations) is a reputable manufacturer known for producing high-quality, heavy-duty aftermarket parts. The A-arm is likely constructed from robust materials (such as steel or reinforced aluminum) to withstand the stresses of plowing, salt, and rough terrain.

3. **Improved Performance** If the original A-arm was damaged or worn, replacing it with a new, properly aligned part can restore proper steering response, reduce vibration, and prevent premature tire wear. A high-quality A-arm may also offer slight improvements in articulation or load-bearing capacity.

4. **Warranty Coverage** SPI parts often come with warranties (typically 1 2 years), providing peace of mind against defects in materials or workmanship. This can be valuable if the part fails early due to manufacturing issues.

5. **Cost-Effective Alternative to OEM** While not an exact OEM part, the SPI A-arm is often priced lower than a brand-new OEM replacement from Yamaha, offering a budget-friendly solution without sacrificing quality.

6. **Ease of Installation** Since it s a direct-fit replacement, installation should be straightforward for those with basic mechanical skills. The part is likely pre-drilled and pre-punched for bolts, simplifying the process compared to custom-fabricated solutions.

7. **Compatibility with Upgrades** If you ve made other modifications (e.g., wider tires, suspension upgrades), a high-quality A-arm like this one can help maintain proper geometry and prevent binding.

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1. **Non-OEM Part** While SPI is a trusted brand, this is not an exact OEM Yamaha part. Some customers prefer OEM components for warranty or resale purposes, though the difference in quality is often negligible for aftermarket parts.

2. **Potential Fitment Variations** Although SPI markets this as a direct-fit, minor adjustments (e.g., bolt spacing or mounting hole alignment) may be required depending on the specific year or variant of your 8KR-F357A. Always verify fitment with your vehicle s build date and any prior modifications.

3. **Quality Control Concerns** While rare, aftermarket parts can occasionally have inconsistencies in manufacturing. Always inspect the part upon arrival for defects (e.g., cracks, misaligned holes, or rust) before installation.

4. **Limited Customization** Unlike some high-end aftermarket parts, this A-arm is not designed for aggressive off-road or extreme modifications. It s a functional replacement, not a performance-enhancing upgrade.

5. **Installation Complexity** While generally straightforward, replacing an A-arm requires proper alignment and torque specifications. Improper installation can lead to steering issues, uneven tire wear, or premature failure. If unsure, consult a professional.

6. **Resale Value Impact** If you plan to sell the vehicle later, some buyers may prefer OEM parts, though this is rarely a dealbreaker for well-maintained machines.

7. **Availability and Lead Times** Aftermarket parts can sometimes have longer lead times than OEM components, especially if the supplier is backordered or experiences shipping delays.

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The **SPI SM-08664LYAM Lower Left A-Arm** is a **strong, cost-effective replacement** for the Yamaha 8KR-F357A models, offering durability, compatibility, and performance benefits over a worn or damaged original part. It s an excellent choice for those seeking a **reliable, high-quality aftermarket solution** without the premium price of OEM parts.

- **Buy it if:** You need a direct-fit, durable replacement for a failing A-arm and prioritize quality over OEM branding. It s ideal for daily use, plowing, and general maintenance.

- **Avoid it if:** You require absolute OEM compatibility (e.g., for warranty or resale purposes) or are uncomfortable with aftermarket parts. In that case, consider an OEM replacement from Yamaha (if available) or a reputable dealer.

- Verify the part number matches your exact model (check for any subtle differences between -00 and -10 variants).

- Inspect the part for defects upon receipt and follow torque specifications during installation.

- Consider replacing the **right A-arm** at the same time if both sides are worn, as misalignment can cause steering issues.

- If you re unsure about installation, consult a Yamaha dealer or a professional with experience in heavy-duty equipment maintenance.

**Final Verdict:** **Highly recommended** for most users as a practical, high-quality replacement.

Details:

Replacement Lower Left A-Arm. Includes ball-joint 4 bushings press fit into place. Made in Taiwan. Designed to reduce weight and add strength.

Manufactured by SPI. Available in black only. Made of 4130 chorally steel for lightness and durability. Compatible with Yamaha model's below: 2015 SR Viper XTX LE.

Replaces OEM# 8KR-F357A-00-00 8KR-F357A-10-00.

part #: sm08664lyam prices

• $118.00-$119.95

specifications snowmobileshocksoi:

• for makes: Yamaha
• brand: Spi
• mpn: Sm-08664lyam
• part type: Arm
• country of origin: Taiwan

returns snowmobileshocksoi:

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

offer snowmobileshocksoi:

• started: February 10, 2026
• sold: 0
• availability: In Stock
• quantity: 4
• options: Ship-to-home

payments snowmobileshocksoi:

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

seller snowmobileshocksoi:

• # reviews: 405380
• city: Suamico, Wisconsin
• rating: 99.8%

general snowmobileshocksoi:

• condition: New
• Parts Accessories > Snowmobile Parts > Shocks Suspension

shipping snowmobileshocksoi:

• transit: 3-8 Days
• cost: $0.00
• service: Standard
• type: Fixed
• class: Standard

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