Spring Rear 16in x 5in x 50# Platinum

The Spring Rear 16in x 5in x 50# Platinum by EIBACH is a precision-engineered coil spring designed for automotive suspension tuning and performance modifications. Built for enthusiasts and professional mechanics who demand consistent spring rates and reliable load support, this rear spring delivers the linear spring characteristics essential for handling upgrades, lowering kits, and custom suspension geometry work. Whether you're building a track-focused machine or refining street performance, EIBACH's platinum-grade construction ensures repeatability across temperature ranges and load cycles that define real-world driving.

At 50 pounds per inch (50#), this coil spring provides moderate spring stiffness—a sweet spot for balancing ride comfort with body roll control during spirited cornering and acceleration. The 16-inch free length and 5-inch diameter dimensions integrate seamlessly into factory and custom rear suspension designs, allowing the spring to work harmoniously with dampers and anti-roll bars without packaging conflicts. EIBACH's proprietary steel alloy and shot-peening process resist stress cracking and fatigue, maintaining load consistency over thousands of compression cycles. The platinum finish protects against corrosion and heat damage, ensuring longevity in harsh underbody environments and high-temperature racing applications.

Mechanics and tuners specify EIBACH rear springs for vehicles requiring OEM-compatible or custom suspension geometry—from daily-driven sport sedans to competitive road-racing platforms. Installation pairs naturally with OEM shocks, coilover dampers, or aftermarket suspension components; confirm mounting eye diameter and seat type before ordering to guarantee proper fitment. The 3.87-pound weight per spring minimizes unsprung mass while maintaining durability, contributing to improved acceleration response and wheel compliance on varying road surfaces. This spring is ideal for suspension rebuilds, performance upgrades, and long-term reliability in both street and motorsport environments.