The Eibach EMS Rear Spring Kit optimizes KTM 150SX motocross performance with dual tuned spring rates. Crafted from high-tensile steel, this pair of rear springs enhances traction and stability for 150SX dirt bikes. Designed for racing or trail riding, it ensures precise suspension response. Professional installation with compatible shocks is required. Powder-coated for durability, it includes a limited lifetime manufacturer warranty.