SKU: 300-70-0040 | UPC: 803050342652
Eibach ERS 300mm Length x 70mm ID Coil-Over Spring – 4kg/mm Rate
The Eibach ERS 300mm Length x 70mm ID Coil-Over Spring is a high-performance racing spring designed for custom coilover assemblies on street, track, and drift vehicles. With a 4kg/mm spring rate, it delivers firm response and consistent ride heights across various motorsport applications. Engineered for endurance, this spring ensures reliable performance under demanding conditions.
Key Features
- 300mm Free Length: Provides ample travel and precise ride height adjustment in most coilover struts.
- 70mm Inner Diameter: Direct fit for standard coilover perches and bodies used in popular aftermarket kits.
- 4kg/mm Spring Rate: Balances stiffness for sharp cornering and compliance over bumps, ideal for autocross to circuit racing.
- Chrome Silicon Steel: High-tensile material resists fatigue, with shot-peening for extended lifespan under high loads.
- Squared and Ground Ends: Ensures flush seating on perches for even load distribution and easy installation.
Product Notes
- Inspect spring seating upon installation to confirm proper orientation.
- Avoid repeated full compressions during break-in to preserve longevity.
- Packaged in protective sleeve to prevent damage during transit.
Installation Notes
- Professional installation recommended.
- Requires 70mm ID-compatible coilover perch and top hat assembly.
- Use threadlocker on adjuster threads; torque to manufacturer specs for perch hardware.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | All | Custom Coilover Kits | All |
Why Choose Eibach?
- Motorsport-proven design trusted in global racing series.
- Tight manufacturing tolerances for repeatable performance.
- Computer-controlled winding process for exact specifications.
Frequently Asked Questions
- Q: Does this spring fit specific vehicles?
A: Universal application for any coilover system with 70mm ID perches, including custom builds on Honda Civic, Subaru WRX, BMW 3-Series, and similar performance cars. - Q: What material and finish does it have?
A: Made from chrome silicon steel alloy, shot-peened, preset, and dual-tempered with color-coded paint for rate identification. - Q: What is the warranty and installation info?
A: Backed by Eibach’s 1-year warranty against manufacturing defects; professional alignment advised post-install for optimal tire wear and handling.
Shipping & Handling
- Method: Standard Ground
- Availability: In stock – ships same or next business day
- Packaging: Protective cardboard sleeve, box dimensions 12″ x 3″ x 3″
- Weight: 4.85 lbs
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