The TRW JCS1606T Rear Coil Spring Set is engineered to meet original equipment (OE) specifications, ensuring consistent performance and reliable handling for Chevrolet HHR models from 2006 to 2009. Designed for easy installation, these coil springs restore the vehicle's ride height and body sway to factory-original standards, enhancing overall driving stability. Constructed with high-strength materials and coated for maximum corrosion resistance, the JCS1606T coil springs are built to withstand varying load conditions and road stresses, extending their service life and maintaining optimal performance over time. TRW's commitment to quality is evident in their rigorous testing processes, which include magnetic particle inspections and endurance testing of 500,000 cycles, ensuring that each coil spring meets stringent durability and safety standards. By choosing the TRW JCS1606T Rear Coil Spring Set, fleet operators can expect improved vehicle handling, reduced maintenance costs, and enhanced driver satisfaction, contributing to the overall efficiency and reliability of their operations.