Eibach 0800.225.0450 ERS 8" Coil-Over Spring 2.25" ID 450 lb/in

The Eibach 0800.225.0450 is an 8-inch race main spring with a 2.25-inch inner diameter, engineered for high-performance coil-over suspension systems. This linear-rate spring is part of Eibach's renowned ERS (Eibach Race Spring) system, designed to deliver precise suspension tuning for racing applications and performance enthusiasts.

ERS Double Spring System:

This main spring is designed to work within Eibach's ERS double-spring configuration, which combines main and tender springs to create a progressive suspension response. The system provides a softer initial rate when both springs compress together, then transitions to a firmer ending rate once the tender spring fully closes. With over 700 different spring components available, the ERS system offers virtually unlimited tuning combinations to match specific vehicle dynamics and track conditions.

Key Features:

• 8-inch free length with 2.25-inch inner diameter for coil-over applications
• Linear-rate characteristic determines the final system rate
• High spring travel and deflection capacity at compact mounting lengths
• Shot-peened surface treatment for enhanced fatigue resistance
• Superior corrosion protection through phosphating and epoxy coating
• Precision manufacturing with tight tolerances for consistent performance
• Part number imprinted on spring indicating rate and dimensions
• Block resistance design prevents coil binding
• Individually packaged for protection during storage and shipping

This main spring balances the need for road contact over surface irregularities while maintaining sufficient stiffness to control body roll, squat, and dive during aggressive driving. Compatible with Eibach helper springs to prevent spring looseness at full droop, and tender springs for customized initial rates. Connecting plates (sold separately) allow combination with tender springs for complete suspension tuning flexibility.