Energy Suspension is a leading manufacturer of high-performance polyurethane suspension components. Their part number 8.2108 is a specific bushing kit designed for certain vehicles. If you are looking for a direct replacement that offers improved handling and durability over factory rubber, this kit is worth considering. Below, we cover what the 8.2108 kit includes, which vehicles it fits, its key features, and practical advice for installation and use.
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Energy Suspension 8.2108G Rear Spring Shackle Bushing
What is Energy Suspension Part Number 8.2108?
Energy Suspension part number 8.2108 is a polyurethane bushing set. It typically includes bushings for the front lower control arms on specific vehicles. Polyurethane is chosen over rubber for its higher stiffness, better resistance to oil and grease, and longer service life. The kit usually comes with multiple bushings, washers, sleeves, and grease packets. Always verify the contents against your application.
Vehicle Fitment for the 8.2108 Kit
The 8.2108 kit is most commonly used on General Motors vehicles, particularly:
- Chevrolet C10/C15, K10/K15 pickups (1973-1987)
- GMC C1500/K1500 pickups (1973-1987)
- Chevrolet Blazer, GMC Jimmy (1973-1987)
- Chevrolet Suburban (1973-1987)
These trucks and SUVs share a similar front suspension design. Before purchasing, confirm your vehicle’s year, make, and model. Energy Suspension’s online catalog or your vehicle repair manual can help cross-reference.
Key Features of the 8.2108 Bushing Kit
- Material: Hyper-Flex polyurethane. This material is more rigid than rubber, reducing deflection and improving steering response.
- Durability: Polyurethane resists cracking, crumbling, and oil degradation much better than rubber. It can last the lifetime of your vehicle under normal use.
- Performance: Firmer bushings reduce suspension bushing slop, leading to more precise wheel alignment retention and less tramlining.
- Included hardware: Typically comes with new inner metal sleeves, outer washers, and a tube of Energy Suspension grease. This grease is compatible with polyurethane and prevents squeaking.
- Color: Usually red or black (depending on production run). Color does not affect performance.
Installation Considerations
Installing the 8.2108 kit requires moderate mechanical skill. Steps include:
- Jack and support the vehicle safely. Always use jack stands.
- Remove the lower control arm. This may require removing the cotter pin, castle nut, and ball joint or spring. Consult a service manual.
- Remove old bushings. They may need to be pressed out using a hydraulic press or a bushing removal tool. Alternatively, some use a torch to burn out rubber, but that is more difficult.
- Clean the control arm bores. Remove any rust or debris.
- Grease the new bushings and sleeves. Apply the supplied grease generously inside the bushing bore and on the inner sleeve.
- Press in the new bushings. Use a press or large C-clamp with appropriate adapters. Ensure the bushing is flush or slightly recessed.
- Reassemble the control arm and tighten fasteners to factory torque specifications.
Important: Only tighten control arm bolts when the vehicle is at ride height (wheels on the ground) to prevent premature bushing failure.
Polyurethane vs Rubber: Why Choose the 8.2108 Kit?
| Attribute | Polyurethane (8.2108) | Rubber (OE) | |-----------|-----------------------|-------------| | Stiffness | Higher | Lower | | Handling response | Tighter, more direct | Softer, more comfortable | | Lifespan | Longer (can outlast the vehicle) | Shorter (hardens and cracks) | | Resistance to oil/grease | Excellent | Poor | | Noise transmission | Slightly higher (may transfer more road noise) | Quieter | | Cost | Moderate | Low |
For daily drivers and performance builds, polyurethane offers a good balance. You’ll notice less body roll and more predictable cornering. If you prioritize ride comfort and low noise, rubber may be better. However, many enthusiasts prefer the controlled feel of Energy Suspension bushings.
Where to Use the 8.2108 Kit
The 8.2108 kit is specifically for the front lower control arm rear bushings on the vehicles listed. Some kits also include the front lower control arm front bushings. Check your kit contents. Do not use these bushings in other locations (like sway bars or leaf springs) unless specified.
Final Recommendation
If you own a 1973-1987 GM pickup, Blazer, or Suburban and want to improve steering feedback and reduce bushing play without breaking the bank, the Energy Suspension 8.2108 kit is a solid choice. Ensure you buy from a reputable dealer to avoid counterfeits. Follow the installation steps carefully, especially the pre-loading step (tightening at ride height). With proper installation, these bushings will last for many years and thousands of miles of confident driving.