2.5 and 4.5″ Lift Springs for the 2005+ Super Duty Platform. Carli springs are Shot Peened and Pre-Set, then powder coated by the manufacturer ensuring they won’t sag and the finish will last for years to come.

The 2.5″ Lift Springs are a linear spring with a slightly softer rate than stock to provide a leveled stance and smooth ride through the whole travel stroke.

The 4.5″ springs are side specific and multi-rate to provide ride comfort and a secondary increased spring rate to prevent the suspension from hitting the bump stops in their massive travel range.