Swift Coil-Over Helper Spring - 2.5" ID x 5.0" Tall - 50 lb. Turnlock Fastener Insert Plate Accepts metric and big brake

Accepts metric and big brake caliper

Ideal for mild performance applications

1995-2011 Mercury Grand Marquis

and EFI systems that use feedback control to auto tune

1985-1993 GMC Safari

Swift Coil-Over Helper Spring - 2.5" ID x 5.0" Tall - 50 lb. Turnlock Fastener Insert Plate Accepts metric and big brakeUnlike our assist springs, our helper springs are specifically designed to have a minimal effect on the spring rate of the main coilover spring. Helper springs allow the spring to stay on mounted on the coilover perch when the shock is under negative or zero load, also known as droop travel. It is ideal to run helper springs on setups where you cannot preload the main spring due to height issues or when experiencing springs coming loose from the