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- Lifetime Warranty. Prothane guarantees all Prothane Suspension Parts to be free of defects in materials and workmanship (not due to abuse, neglect or misapplication) for the total time the vehicle remains with the original purchaser of the product(s). Should the products fail to meet these conditions, Prothane will replace the product, free of charge. This excludes any and all related labor charges. The product must be shipped to Prothane (postage prepaid) along with a copy of the original receipt."
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Rear Coil Spring Isolator Pads - Ford Focus - 61705
Prothane Spring Isolators
Primarily designed to eliminate the vibrations and noise created by driving over uneven surfaces, coil springs come standard on almost every vehicle today. Another key component to this system are the coil spring isolators. While the coil springs take the edge off of the most intense bumps and vibrations, coil spring isolators are made to smooth out what's left. Additionally, coil spring isolators are used to protect the control arms from impacting the coil spring. OE isolators are usually made out of rubber. While rubber is good at absorbing vibrations, it doesn't last long against the constantly shifting weight and pressure.
Prothane's coil spring isolators are made of polyurethane, a material much more durable than rubber. Easily capable of dealing with the varying pressures, Prothane's polyurethane coil spring isolators will last much longer than the OE rubber. Since these isolators are made of polyurethane instead of rubber, your NVH might increase slightly. However, knowing that you won't ever have to replace those isolators again is well worth it. Plus, Prothane covers all of their coil spring isolators with a lifetime warranty handled in-house here at DST.