QA1 High Travel Coil-Over Spring - 2.500" ID - 12.000" Length - 400 lb/in Spring Rate - Black Powder Coat H753C4452 5 x 27 in Polycarbonate

5 x 27 in Polycarbonate Braces

is perfect for the person looking for an aggressive exterior sound level while maintaining a moderate interior sound with all of the performance benefits that you would expect from Flowmaster

How about a replacement ECU for your older Holley C950

1976-1980 Avanti II

QA1 High Travel Coil-Over Spring - 2.500" ID - 12.000" Length - 400 lb/in Spring Rate - Black Powder Coat H753C4452 5 x 27 in PolycarbonateQA1 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