Eibach ERS 70mm ID Linear Tender Spring - 2.99" Length (40-70-0040) YMM_2000_2005_Pontiac_Bonneville_X_GMX310 Drivers looking to support increased

Drivers looking to support increased horsepower and torque

1 - Installation instruction

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Eibach ERS 70mm ID Linear Tender Spring - 2.99" Length (40-70-0040) YMM_2000_2005_Pontiac_Bonneville_X_GMX310 Drivers looking to support increasedLinear Tender Spring by Eibach The ERS systems relies on a Main and Tender spring concept that provides a softer initial rate when both springs are compressed together, then delivers the desired firmer ending rate once the tender spring closes completely. The Main spring has a linear rate characteristic and determines the final rate of the system. The Tender springs are available in a variety of linear rate as well as progressive rate characteristics