Eibach 1400.250.0350 ERS Race Main Coilover Spring 14" x 2.5" x 350 lb/in

The Eibach 1400.250.0350 is a high-performance race main spring engineered for the company's renowned ERS (Eibach Race Spring) double-spring system. This linear-rate coilover spring measures 14 inches in length with a 2.5-inch diameter and delivers a spring rate of 350 lb/in, providing the precise suspension tuning needed to transfer power to the track through optimum tire adhesion.

ERS Double-Spring System:

The ERS system utilizes a Main and Tender spring concept that delivers exceptional tuning flexibility. When both springs compress together, the system provides a softer initial rate for superior road contact and compliance. Once the tender spring fully compresses, the main spring's firmer rate takes over, reducing body roll, squat, and dive during cornering, acceleration, and braking. With over 700 different spring components available, suspension engineers can create nearly unlimited combinations to achieve the perfect balance between compliance and control.

Key Features:

• Linear-rate main spring design determines the final rate of the ERS system
• Shot-peened surface treatment for enhanced fatigue resistance
• High spring travel and deflection capability at compact mounting lengths
• Superior block resistance for consistent performance
• Phosphate and epoxy coating provides excellent corrosion protection
• Manufactured to precise tolerances for predictable performance
• Part number imprinted directly on spring for easy identification
• Individual protective packaging to prevent damage during shipping and storage

This main spring is designed to work with Eibach Tender springs (which determine initial rate) and can be paired with Helper springs to prevent spring looseness at full droop. Connecting plates are available separately to join main and tender springs in the ERS configuration.