Eibach ERS 18.00-Inch Coilover Spring, 3.75-Inch Inside Diameter, 400 lb/in Rate - EIB1800.375.0400S

Renowned for our extensive catalog of over 1,500 precision engineered race springs. Eibach race springs offer unparalled customization and performance optimization across a wide spectrum of racing applications. From shocks to pull-bars we offer a wide range of springs solutions to fine tune the handling dynamics of your race car. Individual Motorsport Spring

• Eibach 3.75" Inside Diameter Coilover Springs Available in a Full Range of Rates and Lengths
• Maximum Travel in Combination with Smallest Block Heights
• Legendary Eibach Off-Road Durability and Performance
• Highest Linearity and Guaranteed Consistency
• Each Spring Individually Tested

The Eibach ERS EIB1800.375.0400S Individual Motorsport Spring is engineered for race vehicles that require precise suspension tuning and dependable performance. Designed with a 3.75-inch inside diameter, this coilover spring provides a reliable foundation for optimizing vehicle handling across a wide range of motorsport applications. Its 400 lb/in spring rate supports controlled suspension response and allows racers and builders to fine-tune chassis balance according to track conditions, driving style, and vehicle setup.

Eibach race springs are developed for maximum travel while maintaining a compact block height, helping make efficient use of available suspension space. The spring is manufactured for high linearity and consistent performance, allowing suspension adjustments to remain predictable throughout repeated use. Every spring is individually tested to help ensure dependable quality and uniform response from one component to the next. Eibach’s proven off-road durability and motorsport engineering make this spring a suitable choice for demanding racing environments, custom coilover systems, and performance suspension builds.

Key Product Specifications and Technical Data

• Product Type: Individual motorsport coilover spring
• Brand: Eibach
• Part Number: EIB1800.375.0400S
• Spring Series: ERS
• Inside Diameter: 3.75 inches
• Nominal Spring Length: 18.00 inches
• Spring Rate: 400 lb/in
• Application: Racing, motorsport, and performance coilover suspension systems

What's Included

• One Eibach ERS individual motorsport coilover spring

Fitment is application-specific and should be confirmed against the vehicle, coilover hardware, required spring rate, and available suspension travel before installation. This spring is intended for compatible racing and performance suspension systems rather than universal direct-fit installation on every vehicle. Professional setup and suspension tuning are recommended to achieve the desired handling characteristics.

Features:

• 3.75-inch inside diameter supports compatibility with matching coilover suspension hardware
• 400 lb/in spring rate enables precise suspension tuning for racing and performance applications
• 18.00-inch spring length provides substantial available suspension travel when properly matched to the system
• Individually tested for high linearity, consistent performance, and dependable motorsport quality

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: false
Units Per Sku: 1