This front strut and coil spring assembly delivers precision-engineered performance for the 20042008 Pontiac Grand Prix. Designed as a direct replacement for the front left and right positions, it integrates seamlessly with models equipped with 16, 17, or 18-inch wheels. The assembly features a robust construction with a thicker strut pipe and a heavy-duty spring, providing enhanced structural intensity and ride stability. The spring has undergone over 600,000 continuous fatigue tests, ensuring exceptional tensile strength and long-term resilience. Filled with Japanese ENEOS damping oil, the shock absorber maintains consistent performance across a wide temperature range from -40C to 80C, backed by rigorous laboratory validation of viscosity, density, and thermal stability. Each unit endures 3,000,000 fatigue durability cycles without oil leakage, preserving damping force integrity. Engineered to match the original extension and compression stroke, this assembly restores factory-level handling and comfort. Its precise OE fitment, keyed to part numbers 172177, 182177, XS857148320, and 11024, ensures a straightforward installation without modifications.
Endures over 600,000 spring fatigue cycles for proven tensile strength
Integrates Japanese ENEOS damping oil for stable performance from -40C to 80C
Utilizes a thicker strut pipe and heavier spring for reliable structural intensity
Withstands 3,000,000 durability tests without oil leakage or damping force loss
Matches exact OE extension and compression stroke for precise factory ride quality
