SPC Performance Specialty Shims Kit

Any solid axle 2WD or 4WD vehicle, 2011–2025

Part #: 89499

Overview

The SPC Performance Specialty Shims Kit 89499 is an essential upgrade for vehicle enthusiasts and off-roaders seeking precise caster adjustments on solid axle vehicles. Designed to provide versatile and reliable alignment modifications, this kit allows you to fine-tune your vehicle's steering geometry for improved handling, stability, and tire wear. Whether you're customizing your daily driver or preparing your off-road rig, these shims help you achieve optimal alignment settings for your specific driving needs.

Constructed for durability and ease of installation, the SPC Shims Kit offers a practical solution to adjust caster angles without extensive modifications. By changing the caster positive or negative from 1/2° to 4°, you can enhance steering response, improve straight-line stability, and tailor your vehicle's handling characteristics. This kit is perfect for off-road enthusiasts, performance tuners, and anyone looking to optimize their vehicle's alignment for better control and safety.

Key Features

The SPC Performance Specialty Shims Kit 89499 incorporates advanced design and high-quality materials to ensure long-lasting performance and precise adjustments. Key features include:

• Manufactured from high-grade zinc-coated steel for corrosion resistance and durability, ensuring the shims withstand harsh environments and road conditions.
• Includes six shims with a 2° taper, allowing for a wide range of caster adjustments from 1/2° to 4°, providing flexibility for various vehicle setups.
• Designed specifically for solid axle 2WD and 4WD vehicles, making it compatible with a broad range of models and applications.
• Twice the coverage with fewer parts, simplifying installation and inventory management for repair shops and DIY enthusiasts alike.
• Precision-engineered to maintain consistent thickness and taper, ensuring accurate alignment changes and reliable performance over time.
• Easy to install with standard hand tools, requiring no specialized equipment or extensive disassembly.
• Helps improve steering feel, reduce tire wear, and enhance overall vehicle handling by allowing precise caster adjustments.

Construction & Design

The SPC Shims Kit 89499 features a robust construction using zinc-coated steel, which provides excellent corrosion resistance and longevity. The shims are precisely machined to ensure a perfect fit and consistent taper, enabling accurate caster adjustments. Their compact design allows for straightforward installation between the steering knuckle and the control arm, making it accessible for both professional technicians and experienced DIYers.

The tapered design of each shim ensures a secure fit that maintains alignment settings under demanding driving conditions. The kit's comprehensive coverage reduces the need for multiple different shim sizes, streamlining the adjustment process and inventory management. Overall, the design emphasizes durability, ease of use, and precise control, making it a reliable choice for enhancing your vehicle's steering geometry.

Performance & Benefits

By installing the SPC Performance Specialty Shims Kit 89499, you gain the ability to fine-tune your vehicle's caster angle, which directly impacts steering response and stability. Proper caster adjustment can lead to more predictable handling, improved straight-line tracking, and reduced tire wear. This kit is especially beneficial for off-road vehicles that require customized alignment settings to navigate challenging terrains effectively.

While the kit does not claim specific horsepower or torque gains, it significantly enhances your vehicle's handling characteristics, contributing to a safer and more confident driving experience. The high-quality materials and precise engineering ensure that your adjustments remain consistent over time, providing peace of mind and long-term value.

Installation & Fitment

The SPC Performance Specialty Shims Kit 89499 is designed for straightforward installation. It bolts directly between the steering knuckle and the control arm, requiring only basic hand tools. No cutting, drilling, or complex modifications are necessary, making it suitable for both professional shops and DIY enthusiasts. The kit's comprehensive design ensures compatibility with a wide range of solid axle 2WD and 4WD vehicles from 2011 to 2025, providing a versatile solution for caster adjustments.

• Simple bolt-on installation with standard tools
• No need for additional alignment equipment beyond basic procedures
• Helps achieve precise caster angles for improved handling and tire wear

What's Included

• Six zinc-coated steel shims with 2° taper, designed for caster adjustment
• Installation hardware and instructions for a complete, hassle-free upgrade

Ideal For

• Off-road enthusiasts seeking optimal steering geometry for rugged terrains
• Performance tuners aiming to improve handling and stability
• DIY mechanics and professional technicians performing alignment modifications
• Owners of solid axle vehicles looking to correct or enhance caster angles

Emissions Note

This product is designed for off-road and racing applications and is not intended for use on public roads in states with emissions regulations. Please verify local laws before installation.