The Bilstein B14 (PSS) Coilover Suspension Kit (47-165403) provides a race-inspired performance for the Smart Fortwo (451). This kit features manual height adjustment, allowing for a lowering range of 10mm to 20mm at both the front and rear axles. Utilizing Gas-Pressure Technology and Mono-tube/Upside-Down technology, it ensures superior handling and stability. The kit is surface-coated using Triple-C-Technology for long-lasting corrosion resistance. The set includes: 2x Front strut assemblies with adjustable spring seats, 2x Rear shock absorbers, and 4x Performance lowering springs. Component Part Numbers: Front Strut (Left/Right): VM3-G540; Rear Shock Absorber: BM5-G541; Main Spring Front: E4-FD1-Y412A00; Main Spring Rear: E4-FD1-Y521A00.