Helper Spring 3-5/8in ID

The EIBACH Helper Spring 3-5/8in ID is a load-assisting suspension component engineered to provide supplemental support for vehicles carrying heavy cargo, towing loads, or experiencing excessive suspension sag. Helper springs are essential for truck owners, fleet operators, and enthusiasts who frequently transport payloads that exceed factory spring capacity. By distributing weight more evenly across the suspension system, this helper spring restores ride height and improves handling without replacing OEM springs entirely.

This helper spring features a 3.75-inch inner diameter with a 45 lb spring rate and measures 6.07 inches in length, making it compatible with a wide range of light-duty and mid-size truck suspensions. Manufactured from high-grade steel and finished with a protective black powder coat, the spring resists corrosion and road salt degradation while maintaining consistent performance under repetitive load cycles. The 45 lb spring rate is calibrated to provide firm support without excessive stiffness, allowing the suspension to absorb road imperfections while controlling vehicle squat during acceleration or braking.

Ideal for pickup truck owners, contractors, and anyone regularly hauling equipment or materials, the EIBACH Helper Spring 3-5/8in ID installs alongside existing coil springs to add load capacity without altering the vehicle's base suspension geometry. Installation typically requires minimal tools and fits within factory spring pockets on compatible applications. Verify compatibility with your specific make, model, and year before purchase, as inner diameter and spring rate specifications are critical to proper fitment and suspension balance.