Eibach Spring Isolator 2.5in ID

Eibach Spring Isolator 2.50in Inside Diameter – ERS Series Suspension Hardware – High-Performance Coilover Spring Interface

Optimize your suspension’s precision and eliminate unwanted friction with the Eibach Spring Isolator (Part #ISOLATOR250). Engineered for 2.50-inch inside diameter springs, this isolator is a vital component of Eibach’s ERS Race Spring System, designed to ensure smooth, consistent spring operation across the entire deflection range.

Constructed from lightweight, durable, and high-resilience materials, this isolator delivers quieter suspension performance and extends spring life by minimizing torsional binding and metal-to-metal contact. Whether you’re fine-tuning a professional coilover setup or upgrading a race-ready suspension system, Eibach isolators are the foundation for repeatable, precision-controlled performance.

Precision-Engineered for Smooth, Friction-Free Suspension Action

Every time your coil spring compresses and rebounds, lateral motion and torsional stress can cause micro-binding that disrupts spring rate consistency. The Eibach ISOLATOR250 acts as a precision barrier, reducing friction between the spring and its perch or coupler. The result is a more controlled, linear spring response — critical for maximizing traction, grip, and chassis balance.

Performance Advantages:

• Reduces Torsional Binding: Eliminates friction-induced spring twist during compression and rebound.

• Improves Spring Consistency: Maintains precise, repeatable spring rate and deflection curve.

• Quieter Operation: Damps vibration and prevents metal-to-metal noise.

• Protects Spring Surface: Extends spring life and prevents powder coat degradation.

This isolator is a must-have for any high-travel coilover or multi-spring setup — from off-road desert racing to autocross and road-course builds.

Designed for Eibach ERS and Universal Coil Springs

Engineered for compatibility with 2.50-inch inner-diameter coil springs, the Eibach Spring Isolator integrates seamlessly with most common coilover configurations. It can be installed between the spring and coupler, on top of helper springs, or at the contact point between the spring and perch.

Compatible Systems Include:

• Eibach ERS Series Coil Springs

• Tender / Helper Spring Configurations

• Universal Coilover Assemblies

• Custom Suspension Fabrications

The isolator ensures full rotational freedom of the spring under compression — critical in maintaining linearity and traction, especially under corner load or off-axis compression scenarios.

Technical Specifications

Race-Proven Durability

Like every component in the Eibach ERS lineup, the ISOLATOR250 is built for demanding real-world performance. Its polymer construction offers a unique combination of compression resistance and elasticity, maintaining dimensional integrity even under high-load, high-temperature environments.

Key Features:

• Resists compression set and material fatigue.

• Maintains elasticity for consistent isolation over time.

• Chemically stable — unaffected by oils, solvents, and heat cycles.

• Operates silently under repeated suspension cycling.

This isolator isn’t just a comfort part — it’s a precision-tuning tool that ensures your suspension performs consistently session after session.

Ideal Applications

The Eibach ISOLATOR250 is widely used in:

• Coilover conversions and custom race suspensions.

• Dual-spring and helper-spring configurations.

• Long-travel off-road shock assemblies.

• Track, autocross, and drag-race setups requiring consistent rebound control.

Wherever performance suspension precision matters — the Eibach isolator ensures your spring system remains quiet, controlled, and consistent.

Installation and Setup

Installation is simple and requires no special tools.

Steps:

1. Inspect both spring ends and coupler/perch surfaces for debris.

2. Slide the isolator ring onto the spring seat area.

3. Verify full surface contact between spring and isolator.

4. Install spring assembly per manufacturer torque and preload specifications.

💡 Pro Tip: For dual-spring setups, use isolators at both ends of the coupler to prevent noise and preserve spring rate integrity throughout the suspension’s travel range.

Real-World Benefits

• Eliminate squeaks, rattles, and spring rotation noise.

• Maintain consistent spring compression and rebound behavior.

• Reduce wear on high-value coil springs and perches.

• Optimize performance tuning for both street and race applications.

• Extend suspension component lifespan.

Whether you’re dialing in a rally setup or chasing tenths at the track, friction-free spring movement means more predictable suspension dynamics — exactly what you need for confidence and control at speed.

Backed by Eibach’s Proven Engineering

Eibach’s ERS (Eibach Race Spring) program represents the pinnacle of suspension precision. Used by leading race teams and professional tuners worldwide, every ERS component — from springs to isolators — is designed, tested, and manufactured to the same standard of quality demanded by top-tier motorsport.

The Eibach Advantage:

• ISO 9001:2015 Certified Manufacturing.

• Race-tested designs used in global motorsport series.

• Perfect dimensional accuracy for coilover integration.

• Guaranteed consistency and long-term reliability.

Every isolator is engineered to complement Eibach’s ERS coil springs and spacers, allowing modular customization for spring rate, preload, and deflection fine-tuning.

Why Choose Eibach

Eibach has set the standard for precision suspension components for over seven decades, supporting OEM manufacturers, race teams, and enthusiasts alike. With industry-leading quality control, unmatched consistency, and a proven motorsports legacy, Eibach remains synonymous with performance and precision.

Trusted Worldwide By:

• OEM tuning divisions and racing engineers.

• Off-road desert teams and autocross champions.

• Builders who demand the most from their suspension hardware.

When you choose Eibach, you choose the same level of precision trusted by professionals at every level of performance.

Why Buy from Fenix Motorsports

At Fenix Motorsports, we go beyond retail — we’re fabricators, builders, and enthusiasts who rely on the same components we sell. Every product in our catalog is carefully selected for its engineering integrity, proven performance, and long-term reliability under real-world conditions.

The Fenix Advantage:

• 100% Genuine Eibach Products — No Imitations or Imports

• Expert-Level Technical Support

• Fast U.S. Shipping and Reliable Customer Service

• Trusted Brands Like Eibach, FOX, KING, Baja Designs, Rigid Industries, and NRG Innovations

When precision and performance matter, Fenix Motorsports delivers components that are built to perform and proven to last.

Why Fenix? Because performance starts with precision.