SPORTS PARTS INC 8394-S488629-24 Spi Moly Upper Arm Left Cat 153

( Brand: Sports Parts Inc ), ( Manufacturer Part Number: 8394-S488629-24 ), ( Part Type: Arm )

Review SPORTS PARTS INC Spi Chrome Moly Upper A arm black Arctic Cat 153 Left fits M8 EFI 2007–2010

The **2007 2010 Arctic Cat M8 EFI 153 Left-Side Upper A-Arm (Part #8394-S488629-24, SPI Moly Coated)** is a precision-engineered suspension component designed exclusively for Arctic Cat s high-performance off-road and trail-riding motorcycles. Crafted from high-grade steel, this upper A-arm serves as a critical link in the bike s front suspension system, providing stability, load-bearing support, and precise articulation for optimal handling and durability. The **SPI Moly coating** applied to the arm s critical surfaces enhances its resistance to wear, corrosion, and friction, ensuring longevity even under the demanding conditions of aggressive riding, dusty trails, or off-road adventures. This left-side upper A-arm is engineered to fit seamlessly into the M8 EFI 153 s front suspension geometry, maintaining proper wheel alignment and steering response while absorbing the stresses of rough terrain. Its robust construction and meticulous machining guarantee a tight fit with the bike s existing suspension components, including the lower A-arm, steering stem, and fork mounts, minimizing play and maximizing structural integrity. Whether tackling technical singletrack, carving through rocky descents, or cruising on paved roads, this upper A-arm delivers the reliability and performance expected from Arctic Cat s legendary off-road machinery. Ideal for both original-equipment replacement and custom builds, it is a must-have component for riders seeking to preserve their M8 s suspension performance and overall ride quality.

### **Pros and Cons of buying a Sports 8394-S488629-24 SPI Moly Upper A-Arm (Black) for a 2007-2010 Arctic Cat M8 EFI 153 Left**

1. **OEM Replacement Quality** This part is designed as an original equipment (OEM) replacement, meaning it should fit and function identically to the factory component. This reduces the risk of compatibility issues or premature wear.

2. **Durability** SPI Moly is a well-known manufacturer of high-quality aftermarket parts for off-road and ATV applications. Their components are often built to withstand harsh conditions, making them a reliable choice for heavy-duty use.

3. **Performance Benefits** The upper A-arm plays a critical role in suspension geometry, stability, and handling. A properly fitted replacement can improve ride comfort, reduce stress on other suspension components, and enhance overall control, especially on rough terrain.

4. **Compatibility** This specific part is listed for the 2007-2010 Arctic Cat M8 EFI 153 (left side), ensuring a direct fit without modification. This eliminates guesswork and potential installation challenges.

5. **Black Finish** The black powder-coat finish is not only aesthetically pleasing but also provides corrosion resistance, which is beneficial for off-road use where parts may be exposed to mud, water, and debris.

6. **Warranty and Support** SPI Moly typically offers warranties on their parts, providing some assurance against defects. Additionally, they have customer support and may offer installation guidance if needed.

7. **Cost-Effective Alternative to OEM** While not an exact OEM part, this aftermarket option is often more affordable than purchasing a genuine Arctic Cat replacement, offering a balance between quality and price.

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1. **Aftermarket vs. OEM Concerns** Although SPI Moly is reputable, some riders prefer genuine OEM parts for absolute confidence in fitment, longevity, and performance. There is a slight risk of minor differences in tolerances or materials compared to the original part.

2. **Installation Complexity** Replacing an upper A-arm requires mechanical skill, proper tools, and sometimes specialized equipment (e.g., torque wrench, alignment tools). If the rider lacks experience, improper installation could lead to binding, premature wear, or suspension issues.

3. **Potential for Counterfeit Parts** While SPI Moly is legitimate, the aftermarket is prone to counterfeit or low-quality knockoffs. Purchasing from an authorized dealer or verified seller (e.g., official SPI Moly distributors, reputable online marketplaces) mitigates this risk but requires due diligence.

4. **Limited Customization** Unlike some high-end aftermarket suspension parts, this is a direct replacement. It does not offer adjustable geometry or performance tuning options, which may be a drawback for riders seeking advanced suspension modifications.

5. **Resale Value Impact** If the ATV is ever sold, some buyers may prefer OEM or high-end aftermarket parts, potentially reducing resale value slightly. However, this is usually a minor consideration unless the ATV is being sold in pristine condition.

6. **Wear and Tear Over Time** While SPI Moly parts are durable, no component lasts indefinitely. The upper A-arm may still require replacement after significant mileage or heavy use, depending on riding conditions and maintenance.

7. **Availability and Lead Times** Aftermarket parts can sometimes have longer lead times or limited stock compared to OEM components, especially for older or less common models like the Arctic Cat M8.

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The **Sports 8394-S488629-24 SPI Moly Upper A-Arm (Black)** is a **strong aftermarket alternative** to an OEM part for the 2007-2010 Arctic Cat M8 EFI 153. It offers **reliable performance, durability, and compatibility** while being more affordable than a genuine Arctic Cat replacement. The black finish adds practicality and style, and SPI Moly s reputation ensures a high standard of quality.

However, the **main drawbacks** revolve around **installation difficulty, the risk of counterfeit parts, and the lack of customization**. For most riders, the **pros outweigh the cons**, especially if the part is purchased from a trusted source and installed correctly. If budget is not a concern, an OEM part may offer marginal peace of mind, but the SPI Moly option provides a **cost-effective, high-quality solution** for most users.

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- You need a **direct, high-quality replacement** for your upper A-arm.

- You trust SPI Moly s brand and have verified the seller.

- You are prepared to **install it properly** (or have it installed by a professional).

- You prioritize **durability, fitment, and performance** over OEM branding.

- You are unsure about **installation complexity** and lack mechanical experience.

- You suspect the part may be a **counterfeit** (buy from authorized dealers only).

- You require **adjustable or high-end suspension tuning** (this is a fixed replacement).

- You plan to **keep the ATV long-term** and want to minimize future maintenance risks (though this part is still a solid choice).

**Final Verdict:** **Highly recommended** for riders seeking a **reliable, affordable, and well-supported aftermarket replacement** for their Arctic Cat M8 s upper A-arm. With proper installation and sourcing, it will serve as a **long-lasting and performance-oriented upgrade**.

Details:

This is helpful if you are buying multiple items. 2007 - Arctic Cat M8 EFI 141 Right. I need to exchange an item. 2009 - Arctic Cat M8 153 Son Pro LE Right.

Parts without fitment are to be assumed universal and may require vehicle modification. SPI Chrome Moly Upper A-Arm-Black for 2007 2010 Arctic Cat M8 EFI 153 Left: Application: Left.: Brand: Sports Parts Inc, model Number: 8394-S488629-24.

part #: 8394s48862924 price

• $67.84

specifications snowmobileshocksoi:

• for models: M8, Efi
• for makes: Arctic, Arctic-cat
• for years: 2007-2010
• brand: Sports Parts Inc
• mpn: 8394-s488629-24
• part type: Arm

seller snowmobileshocksoi:

• rating: 99.9%
• city: San Marcos, CA
• # reviews: 82026

general snowmobileshocksoi:

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

offer snowmobileshocksoi:

• options: Ship-to-home
• started: April 5, 2026
• sold: 0
• availability: In Stock
• quantity: 9

shipping snowmobileshocksoi:

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

payments snowmobileshocksoi:

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

returns snowmobileshocksoi:

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

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