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How Stock Car Suspensions Work

        Auto | NASCAR Racing

Stock Car Bushings

So far we've learned about the major components of the suspension system of stock cars. Now we'll move on to bushings, which are little pieces of the puzzle that can make a big difference in how the major components of the suspension system react to turns and straightaways.

Bushings are small, flexible, generally cylindrical rubber pieces that are found between pivot points and moving arms in the chassis and suspension assembly. In normal cars they're designed to soften the ride. Most stock car drivers prefer a stiffer ride, with bushings made of varying densities of polyurethane or solid polymers [source: Orijin Motorsports].

Suspension bushings are placed between springs, mounts and the control arms on the front of the car and in the trailing arms of the rear axle. They're also found in sway bar connections and in various other places on the car. Worn bushings slow down the response of the suspension, causing the driver to experience wobbling [source: Orijin Motorsports].

­Sway bars may look like crowbars, but their job is quite different. Next we'll learn about where to place stock car sway bars and what their purpose is.