QA1 High Travel Coil-Over Spring - 2.500" ID - 12.000" Length - 200 lb/in Spring Rate - Black Powder Coat H76403FXXL Shift Improver Kit for 4R70W

Shift Improver Kit for 4R70W Automatic Transmission

13/16"-16 filter thread size

Works with B&M launch control 12 or 16-volt systems

GM Gen III/LS1/LS2/LS6 Endure-X Solid Roller Lifters from COMP Cams are engineered to withstand the demands of aggressive cam lobe designs and increased RPM ranges

Keihin Jetting

QA1 High Travel Coil-Over Spring - 2.500" ID - 12.000" Length - 200 lb/in Spring Rate - Black Powder Coat H76403FXXL Shift Improver Kit for 4R70WQA1 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