Rear Spring 5in ID 11in Tall

The Rear Spring 5in ID 11in Tall is a precision-engineered coil spring designed for suspension tuning and vehicle modification. Built for mechanics and enthusiasts who demand control over ride height, handling geometry, and load capacity, this conventional coil spring delivers the foundation for effective suspension geometry changes. Whether you're lowering a chassis, adjusting spring rates for track use, or replacing worn OEM springs, this rear spring addresses the core need: consistent, predictable spring rate performance under real-world driving conditions.

This rear spring features a 375 lb/in spring rate and an 11-inch compressed height, paired with a 5-inch inner diameter specification that ensures proper seating on standard suspension platforms. Constructed from high-grade steel and finished with blue powder coating for corrosion resistance, the spring maintains dimensional stability across thermal cycling and repeated articulation. The 375 lb/in rate sits in the middle-stiffness range—aggressive enough for lowered setups and performance driving, yet compliant enough to absorb road imperfections without inducing harshness on daily-driven vehicles. The blue powder coat not only protects against rust but also provides visual identification during installation and future suspension work.

Rear spring replacement is essential when original springs lose preload, sag under load, or when upgrading to a lowered or stiffer suspension package. This spring suits rear-axle applications requiring 375 lb/in stiffness and pairs well with performance dampers, anti-roll bars, and geometry correction kits. Verify your vehicle's current spring rate, ride height targets, and suspension geometry before installation—pairing mismatched front and rear rates or neglecting complementary upgrades can degrade handling balance. Always install springs in pairs (left and right) for symmetrical suspension geometry, and torque all fasteners to OEM specification.