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Common Leaf Spring Bushing Upgrades for Muscle Cars

by:GJ Bush     2023-08-24

Common Leaf Spring Bushing Upgrades for Muscle Cars


Leaf springs are an essential component of muscle cars, providing support and stability to the vehicle. Over time, these leaf springs can start to show signs of wear and tear, resulting in a decrease in overall performance. One effective way to enhance the performance and longevity of your muscle car's leaf springs is by upgrading the bushings. In this article, we will explore the most common leaf spring bushing upgrades for muscle cars and discuss their benefits.

1. Why Leaf Spring Bushings Matter:

Leaf spring bushings play a crucial role in the suspension system of a muscle car. These bushings function as a buffer between the leaf spring and the mounting points, providing a cushioning effect. They absorb vibrations, shock, and road irregularities, allowing for a more comfortable and controlled ride. Additionally, bushings help to maintain proper alignment, reducing unwanted noise and ensuring the tire's contact with the road remains optimal for better handling.

2. Polyurethane Bushings:

Polyurethane bushings are a popular choice among muscle car enthusiasts when it comes to leaf spring upgrades. These bushings are made from a high-quality synthetic material that offers several advantages over the stock rubber bushings. Polyurethane bushings are more durable, resistant to wear and tear, and can withstand extreme temperatures and weather conditions. They provide enhanced stability, responsiveness, and improved handling by reducing wheel hop and body roll. Moreover, polyurethane bushings offer minimal deflection, resulting in better control and more precise steering.

3. Delrin Bushings:

Delrin bushings are another excellent option for upgrading leaf spring bushings in muscle cars. Delrin, a type of acetal resin, is known for its exceptional stiffness and low friction properties. By replacing the stock rubber bushings with Delrin, muscle car owners can significantly improve the overall suspension performance. These bushings offer reduced flex, resulting in improved weight transfer during acceleration and deceleration. With better weight transfer, muscle cars can experience increased traction and launch more effectively off the line. Delrin bushings also provide a more direct and responsive feel when cornering, enhancing the driving experience.

4. Spherical Bushings:

Spherical bushings, also known as rod end bushings, are a more advanced leaf spring upgrade option. These bushings utilize a spherical bearing rather than a traditional rubber or polyurethane material. Spherical bushings provide better articulation and allow for more unrestricted movement of the leaf spring. This increased flexibility allows the suspension to work more efficiently, reducing energy loss and improving traction. With spherical bushings, muscle car owners can expect improved handling, sharper cornering, and enhanced overall performance.

5. Solid Aluminum Bushings:

For muscle car owners seeking maximum performance and durability, solid aluminum bushings present a compelling option. These bushings are machined from solid blocks of high-grade aluminum, providing unparalleled strength and rigidity. Solid aluminum bushings eliminate any unwanted movement, reducing deflection and flexing under heavy loads. By upgrading to solid aluminum bushings, muscle car enthusiasts can experience improved throttle response, enhanced stability, and better power transfer. However, it's worth noting that solid aluminum bushings may transmit more road noise and vibrations into the cabin compared to other bushing materials.


Upgrading the leaf spring bushings in your muscle car is a valuable investment, improving both the performance and longevity of your vehicle. Whether you choose polyurethane, Delrin, spherical, or solid aluminum bushings, each option offers unique advantages that can enhance your muscle car's suspension system. Before proceeding with any upgrade, it is crucial to consult with a professional mechanic or suspension specialist to ensure compatibility and proper installation. With the right bushing upgrades, your muscle car will handle better, provide a more comfortable ride, and offer an overall superior driving experience.

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