General description maXpeedingrods B1 series Coilovers Suspension Kit is designed for VW Polo Mk4 (9N/9N2/9N3) models from 2001 to 2009. This kit is perfect for those looking to replace old, worn-out struts while enhancing handling performance. It features height adjustability and aims to maintain the original equipment (OE) ride quality as much as possible. Please note that no top mount is included, and modification is required if using OE top mount applications. Technical specifications Adjustable height: Front lowering 30-90mm Adjustable height: Rear lowering 30-75mm Spring rate Front: 3.5kg/mm (196 lbs/in) Spring rate Rear: 2kg/mm (112 lbs/in) Spring length Front: 239mm Spring length Rear: 230mm Helper spring rate Front: 1kg/mm (56 lbs/in) Helper spring length Front: 102mm Spring preload advised: 7-10mm Shock type: twin tube Weight-saving aluminum components and heavy-duty steel lower mount brackets Compatibility and accessories Compatible with VW Polo MK4 9N (10/2001-10/2014)