9.5in x 5.5in x 400# Front Spring

The 9.5in x 5.5in x 400# Front Spring is a heavy-duty coil spring engineered for vehicles requiring enhanced load support and suspension stiffness. Built by LANDRUM SPRINGS, a trusted manufacturer in the automotive suspension industry, this front spring is ideal for mechanics and enthusiasts upgrading factory suspension systems or building custom-tuned platforms. Whether you're lowering a vehicle, compensating for added weight, or fine-tuning ride dynamics, a 400-pound spring rate demands precision installation and matching rear geometry.

This spring delivers a 400-pound load rate—the resistance force required to compress the coil one inch—making it suitable for performance applications and lifted or lowered suspensions where factory springs fall short. The 9.5-inch free length and 5.5-inch coil diameter provide a compact package that fits standard front suspension bays while maintaining proper geometry and clearance during full articulation. At 6.52 pounds, the spring's mass ensures adequate material density for durability under repeated compression cycles, minimizing fatigue cracking and coil separation over thousands of miles. Matching spring rates front-to-rear prevents suspension imbalance, which causes understeer, oversteer, or uneven tire wear.

This front spring works best for users upgrading muscle cars, trucks, or street-driven performance builds where OEM springs lack sufficient rigidity or clearance for modified ride heights. Installation requires removing the wheel, brake caliper, and control arm to access the spring perch—tasks best suited for mechanics with suspension experience or proper coil-spring compressor tools. Always pair this 400# spring with a matching rear spring rate and verify compatibility with your specific vehicle's strut or control-arm design before purchase. Proper installation and alignment check afterward ensure maximum safety, handling, and component longevity.