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75% stiffer on the bottom end for awesome throttle response down low but 15% softer on the top end for faster shift out once the rpm’s are up for faster 0-60 times and perfect for stock tires, larger tires and boosted applications.
Best designed primary spring on the market and made in the USA by HYPERCO for JBS.
Includes:
1 - JBS Primary Spring
Ships within 48 hours · Estimated delivery Jul 25 - Jul 30
US$40
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