Coil Over Kit 1.875IN ID 7Q Series

The Coil Over Kit 1.875IN ID 7Q Series from QA1 is a precision suspension component engineered for builders and enthusiasts serious about controlling vehicle dynamics during modification and performance tuning. This coil-over assembly serves as a foundation for independent suspension geometry work, allowing adjustment of spring rates, ride height, and damping characteristics across a wide range of chassis platforms. Whether you're building a street rod, restoring a classic muscle car, or dialing in a modern street machine, this kit provides the adjustability that separates intentional setup from compromised geometry.

The 1.875-inch inner diameter bore is designed to accommodate a variety of spring rates and coil-over bodies within QA1's 7Q series ecosystem, enabling fine-tuned spring selection based on your target weight transfer, anti-squat, and anti-dive characteristics. This standardized bore diameter ensures compatibility across multiple QA1 applications while maintaining the tight tolerances necessary for repeatable suspension tuning. The compact package—measuring 6.5 x 4.45 x 8.8 inches and weighing just 0.9 pounds—integrates cleanly into suspension bays without excessive modification, critical when preserving factory mounting points or transitioning to custom control arms.

Mechanics and fabricators building custom or modified suspension systems rely on QA1 coil-over kits to establish the baseline damping and spring platform for their geometry work. Installation typically pairs this kit with compatible QA1 control arms and chassis bracing, allowing full adjustment of corner weights, roll center height, and suspension rates. Proper installation requires accurate measurement of ride height, spring preload verification, and alignment checks post-assembly to ensure consistent performance across all four corners and safe operation at intended loads.