QA1 High Travel Coil-Over Spring - 2.500" ID - 10.000" Length - 300 lb/in Spring Rate - Black Powder Coat 1130203 adjustable by 10 RPM increments

adjustable by 10 RPM increments to optimize use of your engine's power band and improve vehicle run performance

From Scott Drake

The results are in and they are simply incredible:

1957-1957 Chevrolet Sedan Delivery

instantaneously transferring power to the rear wheels

QA1 High Travel Coil-Over Spring - 2.500" ID - 10.000" Length - 300 lb/in Spring Rate - Black Powder Coat 1130203 adjustable by 10 RPM incrementsQA1 offers an assortment of high travel springs with a black 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 larger distance between the coils. These lighter springs reduce unsprung weight and