AST Suspension 5100 Series Coilovers (Includes Front/Rear Top Mounts) (True Coilover) - 2005-2011 BMW 3 Series 318i (E9X) helper-springs 3 kg/mm (353 lbs/in) Spring

3 kg/mm (353 lbs/in) Spring Rate (Rear) 7

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AST Suspension 5100 Series Coilovers (Includes Front/Rear Top Mounts) (True Coilover) - 2005-2011 BMW 3 Series 318i (E9X) helper-springs 3 kg/mm (353 lbs/in) SpringThe 5100 Series shock absorbers for the 2005 2011 BMW 3 Series 318i (E9X) utilize inverted upside down technology. The inverted design is race proven technology and produces an extremely strong damper, providing better suspension geometry under heavy lateral and braking loads as seen in a road and track environment. The 5100 Series shock absorbers give your car a better performance than the standard twin tube design. With the 5100 Series suspension