D2 Racing PRO Series Lowering Springs for 2008-2013 Infiniti G37 Coupe B-Class SS (Delta) are designed to

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D2 Racing PRO Series Lowering Springs for 2008-2013 Infiniti G37 Coupe B-Class SS (Delta) are designed toD2 Racing PRO Series Lowering Springs for the 2008 2013 Infiniti G37 Coupe are optimized to improve handling characteristics by offering a reduction in ride height while maintaining exceptional ride quality through the use of a progressive rate spring. All of our springs are manufactured using 55 chrome silicon steel in an ISO 9001 and TUV approved facility. Standard Features Provides a comfortable ride under normal conditions and firmer handling