Hyper-Flex® Polyurethane Construction

Energy Suspension’s proprietary Hyper-Flex® polyurethane is engineered to outperform conventional rubber in nearly every category.

Benefits include:

• Superior wear resistance
• Reduced suspension deflection
• Excellent dimensional stability
• High load capacity
• Resistance to permanent compression

Unlike rubber bushings that deteriorate with age, polyurethane maintains consistent performance for years.

Why Replace Rear Spring Bushings?

Worn rear spring bushings can contribute to:

• Rear suspension clunking
• Excessive axle movement
• Poor handling
• Wheel hop
• Uneven tire wear
• Reduced towing stability
• Loose rear suspension feel

Replacing them restores proper spring movement and helps maintain suspension geometry.

Built to Resist Harsh Conditions

Hyper-Flex polyurethane is engineered to withstand exposure to:

• Motor oil
• Coolant
• Grease
• Road salt
• Ozone
• UV rays
• Dirt and moisture
• Common underbody chemicals

This makes the bushings an excellent long-term solution for vehicles that see daily driving, towing, or off-road use.

Improved Suspension Performance

Installing polyurethane rear spring bushings helps provide:

• Better axle control
• Improved handling
• Reduced suspension flex
• More predictable cornering
• Increased towing stability
• Longer suspension service life

The firmer polyurethane construction allows the leaf springs to operate more consistently without excessive movement.

Installation

Typical installation includes:

1. Safely raise and support the vehicle.
2. Support the rear axle.
3. Remove the leaf spring mounting hardware.
4. Press or remove the original rubber bushings.
5. Install the polyurethane bushings and sleeves.
6. Reassemble and torque all hardware to factory specifications.

Depending on the application, a hydraulic press or specialized bushing tools may be required.

Benefits After Installation

Replacing worn rubber bushings with Hyper-Flex polyurethane can provide:

• Improved suspension stability
• Better handling response
• Reduced axle movement
• Longer service life
• Increased resistance to harsh environments
• More consistent suspension performance

Pros

• Durable Hyper-Flex® polyurethane construction
• Longer-lasting than factory rubber
• Excellent resistance to oil, coolant, and road contaminants
• Improves rear suspension stability
• Helps reduce axle movement
• Ideal for towing, street, and off-road use
• Trusted Energy Suspension quality
• Excellent value compared to repeated rubber replacements

Cons

• Vehicle-specific fitment must be verified
• Firmer than OEM rubber bushings
• Installation may require a hydraulic press
• Professional alignment or suspension inspection is recommended after major suspension work

Final Verdict

The Energy Suspension 5.2118R Rear Spring Bushing Set is an outstanding upgrade for drivers looking to replace worn factory rubber bushings with a more durable and performance-oriented solution. Its Hyper-Flex® polyurethane construction delivers improved suspension control, greater resistance to harsh conditions, and a significantly longer service life than conventional rubber.

Whether you’re restoring an older truck, maintaining a tow vehicle, or upgrading a performance suspension, the 5.2118R offers reliable performance backed by Energy Suspension’s decades of polyurethane engineering expertise.