Application: for BMW 1 Series E82 2008-2013 Coupe for BMW 1 Series E88 2008-2013 Convertible 118d, 118i, 120i, 120d, 123d, 125i, 128i, 135i Specification: Height adjustable: Yes, lowering 1-3 inches depending on the vehicle models Damping adjustable: 24 levels of rebound damping force Camber adjustable: Front Only Spring Rate Front: 8kg/mm(448lbs/in) Spring Rate Rear: 12kg/mm(672lbs/in) Front spring inner diameter: 70.5mm Rear spring inner diameter: 62mm Spring length Front: 180mm Spring length Rear: 230mm Spring Preload advised: 7-10 mm Package included: 2x front coil-overs 2x rear coil-overs 2x C spanners 1x Allen wrench Feature: 1. Lowered height adjustment from 1"" - 3"" (depends on vehicle models) which allows a lower center of gravity and also adds a more aggressive stance 2.24 levels of adjustable damper -- This allows you the ability to perfectly dial in your coil-overs system. For nice comfortable driving, set damping to full soft. For more spirited driving, set it to 16