QA1 CR-S Tapered High Travel Coil Spring - 3.57" ID, 300 lbs/in Rate, 11" Length - 1977-1978 Buick Riviera 575 RS-R Sports-i coilovers for the

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QA1 CR-S Tapered High Travel Coil Spring - 3.57" ID, 300 lbs/in Rate, 11" Length - 1977-1978 Buick Riviera 575 RS-R Sports-i coilovers for theAvailable in 7", 9", 10", 12", 14" and 16" lengths, QA1 offers an assortment of High Travel Springs for the 1977 1978 Buick Riviera with a silver powder coated finish. Made in the USA, these 2" I. D. High Travel Springs are manufactured from specially designed high tensile, chrome silicon alloy spring wire, which allows them to have fewer coils and a smaller wire diameter. As a result, these springs are lighter and have increased travel due to the