Eibach ERS 4.00-Inch Length x 2.25-Inch ID Coil-Over Race Spring, 300 lb/in

Eibach's ERS line has evolved over the years to be the world's most prominent, comprehensive and superior Race Spring System. Eibach Race Springs are all manufactured in series production, often repeated, with a strong manufacturing experience. Thus, Eibach constantly achieves the most linear spring characteristic (rate) while maintaining the lowest tolerances and the highest quality in the industry.

The Eibach ERS Coil-Over Race Spring is engineered for professional and enthusiast racing applications that demand predictable suspension performance and consistent spring behavior. Manufactured as part of Eibach’s comprehensive ERS Race Spring System, this coil-over spring is designed to deliver a highly linear spring rate throughout its operating range.

Eibach produces ERS springs in repeated series production using established manufacturing processes. This helps maintain tight tolerances, consistent performance, and dependable quality from spring to spring. The 300 lb/in rate provides a precise foundation for tuning vehicle suspension geometry, balance, and handling characteristics when matched with the correct coil-over hardware and application requirements.

Its compact racing format uses a 4.00-inch spring length and 2.25-inch inside diameter for compatibility with properly sized coil-over suspension assemblies. The spring is intended for motorsports and performance applications where reliable rate consistency and repeatable setup changes are essential. Confirm vehicle, damper, perch, and suspension compatibility before installation.

Key Product Specifications & Technical Data

• Brand: Eibach
• Part Number: EIB0400.225.3000
• Product Line: ERS Race Spring System
• Spring Type: Coil-over race spring
• Spring Rate: 300 lb/in
• Spring Length: 4.00 inches
• Inside Diameter: 2.25 inches
• Application: Automotive motorsports and performance suspension systems

What's Included

One Eibach ERS coil-over race spring. Coil-over hardware, spring seats, adjusters, and installation components are not included unless specified separately.

Features:

• Linear Spring Rate: Supports predictable suspension response and repeatable vehicle tuning.
• Series Production Manufacturing: Helps maintain consistent spring characteristics and tight production tolerances.
• Racing-Focused Design: Developed for motorsports and high-performance coil-over suspension applications.
• 300 lb/in Spring Rate: Provides a precise performance baseline for suspension setup and chassis balance.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: false