General description Upgraded Coilover Suspension Set designed specifically for BMW 3-Series E90 models from 2006 to 2013, including various engine options. This set is suitable for RWD vehicles only and includes complete coilovers for both front and rear, along with a pair of wrenches for height adjustment. Technical specifications Quantity: Complete coilovers for 2 front and 2 rear Top mounts: Front - Pillow ball top mounts; Rear - OE top mounts required Damping: Not available Spring rate Front: 10 kg/mm (560 lbs/in) Spring rate Rear: 8 kg/mm (448 lbs/in) Spring length Front: 200mm Spring length Rear: 180mm Adjustable height: Lowering 1-3 inches Coilover overall length Front: 485mm-520mm Coilover overall length Rear: 500mm-570mm Shock type: Twin tube Spring preload: 7-10 mm Color: Red Warranty: 2 years for any manufacturing defect Installation Professional installation and alignment are suggested for optimal performance. Usage This coilover suspension set allows for lowered height