Bilstein 4x4 Lift Kit - 40mm (Holden Colorado RC)SKU ROD 007 Foot Note 1 Please note matching spring rates with your vehicles weight is critical to performance. If you are unsure of your vehicles rear load or the spring rate you should get. Then please send us a message or call us to make sure you get the right spring rate. Foot Note 2 Kit Contains 4 x Bilstein shock absorbers. Front springs are 2 x EFS Torsion Bars. Rear Springs are 2 x Formula Leafs. The kit also comes with 2 x Greasable shackles,