The Eibach EMS Rear Spring Kit optimizes KTM 150SX motocross performance with a specialized spring rate. Crafted from high-tensile steel, this kit includes a rear spring for 150SX dirt bikes, enhancing traction and stability for racing or trail riding. Professional installation with compatible shocks is required. Powder-coated for corrosion resistance, it ensures durability in harsh conditions. Includes a limited lifetime manufacturer warranty.