SKU: 1000.300.0400S | UPC: 803050416667
Eibach ERS Linear Main Spring – Silver Coilover Spring 3.00″ I.D. 400 lb/in
The Eibach ERS Linear Main Spring (1000.300.0400S) is a premium silver coilover spring built for high-performance suspension setups. This universal spring fits most strut-type coilover systems across various vehicles, providing a consistent 400 lb/in linear rate for responsive handling. Its robust design supports track days and daily driving with reliable performance.
Key Features
- Linear Spring Rate: 400 lb/in delivers predictable response and balanced control through the full travel range.
- 3.00″ Inner Diameter: Direct compatibility with standard coilover strut bodies for easy integration.
- 7.00″ Free Height: Allows ample suspension travel while maintaining stability under load.
- 0.79″ Wire Diameter: Heavy-duty construction resists fatigue for extended use in racing conditions.
- Silver Powder Coat: Identifies linear rate; shot-peened and stress-relieved for consistent durability.
Product Notes
- Inspect spring ends for proper seating on perches before installation.
- Store in dry conditions to preserve coating and performance.
- Packaged in protective box for secure transit.
Installation Notes
- Professional installation recommended.
- Use quality spring compressors rated for 400+ lb/in rates.
- Compatible with most adjustable coilover sleeves and 3.00″ ID seats.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | BMW | E36/E46 3-Series | All |
| Universal | BMW | E90 3-Series/M3 | All |
| Universal | Mazda | Miata NA/NB | All |
| Universal | Honda | Civic EG/EK | All |
| Universal | Subaru | WRX/STI | All |
Why Choose Eibach?
- Proven in motorsports with championship teams worldwide.
- German-engineered for exact tolerances and load consistency.
- Tested beyond OEM standards for real-world reliability.
Frequently Asked Questions
- Q: Is this spring vehicle-specific?
A: Universal design fits most coilover kits with 3.00″ ID compatibility; verify perch diameter and stroke length for your setup. - Q: What material and finish are used?
A: High-tensile chrome silicon steel with silver powder coat finish; shot-peened, tempered, and preset for shape retention. - Q: What warranty applies?
A: Eibach one-year limited warranty against manufacturing defects for racing springs; register product for coverage.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Protective cardboard box, 10″ L x 7″ W x 7″ H
- Weight: 6.1 lbs
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