Swift Coil-Over Helper Spring - 2.5" ID x 5.0" Tall - 50 lb. Turnlock Fastener Insert Plate 1995-2011 Mercury Grand Marquis

1995-2011 Mercury Grand Marquis

Ideal for mild performance applications

Specifically designed for use with 2 x 3 or round tube rear frame rail kits

1985-1993 GMC Safari

Accepts metric and big brake caliper

Swift Coil-Over Helper Spring - 2.5" ID x 5.0" Tall - 50 lb. Turnlock Fastener Insert Plate 1995-2011 Mercury Grand MarquisUnlike 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