Included in this kit: 2 custom coiled FRONT ( PROGRESSIVE - RATE ) tender springs and 2 REAR 
( PROGRESSIVE - RATE ) tender springs in a improved quality and rate. Improves overall ride quality, resolves oe front & rear spring sag, and works great with your oe internal valving and lower main springs. This kit is intended as a upgrade tender spring kit to work with the oe shocks.