When it comes to upgrading or replacing your vehicle’s suspension bushings, the material and engineering of the components can make a significant difference in performance, comfort, and longevity. Two respected brands in the polyurethane bushing market—Strongflex™ and Siberian Bushing™—offer distinct solutions tailored to different driving needs.

In this article, we’ll explore the key differences between compound PU bushings from Strongflex™ and OEM-standard PU bushings from Siberian Bushing™, helping you choose the best option for your application.

🔧 Material Composition: Compound vs. Standard PU

Strongflex™: Compound Polyurethane Technology

Strongflex™ utilizes advanced polyurethane formulas specifically designed for various automotive applications. Their bushings are offered in two main hardness levels:

• Red (80 Sha) – Balanced for street use
• Yellow (90 Sha) – Designed for motorsport and aggressive driving

These compound PU bushings deliver enhanced durability, increased rigidity, and superior resistance to deformation, especially under high loads or dynamic stress—making them ideal for racing, drifting, and performance-tuned vehicles.

Siberian Bushing™: OEM Standard Polyurethane

Siberian Bushing™ provides bushings engineered to match OEM geometry and comfort, with PU hardness ranging from 70 to 85 Sha, calibrated to closely replicate original rubber characteristics. These bushings are ideal for daily drivers seeking longer-lasting alternatives to rubber without sacrificing ride quality.

Their standard PU compounds offer a longer lifespan and moderate performance gains, though they are not intended for track or extreme-use applications.

✅ Pros and Cons

Strongflex™ Bushings

Pros:

• Available in two hardness options
• Ideal for performance and track applications
• High resistance to wear, oil, and UV exposure
• Designed for aggressive and high-load use

Cons:

• May increase NVH (noise, vibration, harshness)
• Some variants less suitable for daily comfort
• Requires accurate installation and pre-fitment checks

Siberian Bushing™ Bushings

Pros:

• OEM-like ride quality
• Direct fit with factory arms, rods, and bars
• Extended lifespan over traditional rubber
• Ideal for street use and light off-roading

Cons:

• Limited hardness choices
• Less rigid under racing or high-performance stress
• Moderate gains compared to performance PU compounds

🔩 Installation Specifics

Strongflex™ Installation Tips

• Compound design allows for easier installation in most cases
• Some bushings require pressing and PU-compatible lubrication
• Pre-fitment checks are recommended to account for tight tolerances
• Best installed by experienced technicians or tuning specialists

Siberian Bushing™ Installation Tips

• Engineered for 100% OEM fitment
• Typically bolt-in with no modifications required
• Proper greasing is essential to prevent noise and ensure durability

⚖️ Which One Should You Choose?

🔚 Conclusion

Both Strongflex™ and Siberian Bushing™ deliver high-quality polyurethane bushings, but cater to different driving styles and expectations. Whether you’re building a competitive race car or enhancing your daily driver, choosing the right bushing type and hardness is essential for optimal results.

⚠️ Important Note:
Vehicle suspension systems can vary even within the same model and year. To ensure compatibility, we recommend performing a VIN check (Vehicle Identification Number). Our team will verify the correct parts for your vehicle. You can also search by application or OEM number in our online catalog.

💬 Still unsure which bushings are right for your vehicle?
The team at Durable Parts LLC is here to help! Contact us today for expert fitment advice and professional installation support.