Eibach ERS 3.75" I.D. Coil Spring

2011–2025 Subaru Forester / Subaru Outback / Subaru Crosstrek 2.0L, 2.5L

Part #: 1800.375.0300S

Overview

The Eibach ERS 3.75" I.D. coil spring is designed to enhance your vehicle's suspension performance by providing precise spring rate and optimal ride height. Crafted for enthusiasts who seek improved handling, stability, and comfort, this coil spring is ideal for street driving, spirited canyon carving, or light off-road adventures. With a load capacity of 300 lbs/inch, it offers a balanced blend of firmness and compliance, helping support increased load and vehicle control.

Whether you're upgrading your stock suspension or customizing your ride for specific driving needs, the Eibach ERS spring delivers consistent performance and durability. Its engineered design ensures a perfect fitment for compatible Subaru models, helping you achieve a lowered stance or improved suspension geometry without sacrificing ride quality.

Key Features

The Eibach ERS coil spring features advanced engineering and high-quality materials to deliver superior performance and longevity. Key features include:

• Precision-wound steel construction with a 3.75-inch inside diameter, ensuring a perfect fit on compatible Subaru models.
• Rated at 300 lbs/inch, providing a firm yet comfortable ride that enhances handling and cornering capabilities.
• Optimized spring rate for improved vehicle stability, reduced body roll, and enhanced steering response during spirited driving.
• Manufactured with high-tensile steel to resist sagging and maintain consistent performance over time.
• Designed for easy installation with OEM-compatible mounting points, requiring no modifications.
• Suitable for street use, offering a balance between performance and everyday comfort.
• Corrosion-resistant coating to withstand harsh weather conditions and road debris.

Construction & Design

The Eibach ERS springs are crafted from high-quality, high-tensile steel that undergoes rigorous manufacturing processes to ensure durability and consistent performance. The springs feature a progressive coil design that provides a smooth ride at low loads and increased stiffness during aggressive driving. This design helps improve handling without compromising comfort.

The precise manufacturing tolerances and protective coating ensure resistance to corrosion and fatigue, making these springs a reliable upgrade for your vehicle's suspension system. The 18-inch length and 3.75-inch inside diameter are engineered to fit specific Subaru models, providing a seamless installation experience and optimal suspension geometry.

Installation & Fitment

Installing the Eibach ERS springs is a straightforward bolt-on process that typically requires basic tools and standard suspension knowledge. They are designed to replace your factory springs directly, with no need for cutting, drilling, or complex modifications. For optimal results, professional installation is recommended to ensure proper alignment and suspension setup.

• Easy bolt-on installation with OEM mounting points
• No cutting, drilling, or tuning required
• Compatible with Subaru Forester, Outback, Crosstrek (2011–2025) with appropriate suspension setup

What's Included

• Pair of Eibach ERS 3.75" I.D. coil springs
• Installation instructions

Ideal For

• Street enthusiasts seeking improved handling and ride quality
• Subaru owners looking to lower their vehicle for a sportier stance
• Drivers wanting enhanced stability during spirited driving
• Light off-road users requiring durable, load-supporting springs