SKU: 1600.300.0350S | UPC: 803050288066
Eibach ERS Linear Main Spring – Silver Coilover Spring 3.00″ I.D. x 3.50″ Height, 425 lb/in
Eibach ERS linear main spring delivers consistent 425 lb/in rate for precise suspension response in racing coilover setups. This 3.00″ ID silver spring with 3.50″ free height suits custom coilovers on performance vehicles from Honda Civic and Subaru WRX to BMW 3-Series and Nissan 240SX. Track-proven construction ensures reliable cornering and stability under high loads.
Key Features
- Linear Spring Rate: 425 lb/in provides predictable damping and handling for autocross, drifting, and circuit racing.
- 3.00″ Inner Diameter: Direct fit for most aftermarket coilover struts and sleeves, simplifying builds.
- 3.50″ Free Height: Allows low ride heights while maintaining travel and preventing bottoming out.
- Silver Epoxy Powder Coat: Resists corrosion and chipping during harsh track conditions.
- Chrome-Silicon Steel: Shot-peened, heat-treated, and stress-relieved for fatigue resistance and long service life.
Product Notes
- Ideal for replacement in BC Racing, Tein, or Fortlu coilover systems requiring 3″ ID mains.
- Inspect perch and top mount compatibility before installation.
- Packed in protective sleeve; store in dry area to preserve coating.
Installation Notes
- Professional installation recommended.
- Torque per manufacturer specs; use spring compressor rated for 3″ ID.
- Matches standard Eibach helper springs and aluminum perches.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | Honda | Civic | Si / Type R Coilover Builds |
| Universal | Subaru | WRX / STI | Coilover Applications |
| Universal | Nissan | 240SX / Silvia | Drift / Race Setups |
| Universal | Mazda | Miata MX-5 | ND / NC / NB Track Use |
| Universal | BMW | 3-Series | E36 / E46 Custom Coilovers |
Why Choose Eibach?
- Motorsport-proven in Formula Drift and rally championships.
- Precision-wound for exact rate consistency coil-to-coil.
- German-engineered with tolerances under 1% for repeatable performance.
Frequently Asked Questions
- Q: What vehicles does this spring fit?
A: Fits universal 3.00″ ID coilover systems on performance cars like Honda Civic Si (2006-2015), Subaru WRX (2002-2021), Nissan 240SX (1989-1998), Mazda Miata (1989-2015), and BMW E36/E46. - Q: What material and finish does it have?
A: High-tensile chrome-silicon steel construction, shot-peened for strength, with durable silver epoxy powder coat finish. - Q: What is the warranty and installation info?
A: Eibach offers limited lifetime warranty on manufacturing defects; professional alignment required post-install.
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Protective plastic sleeve in 5.25″ x 5.25″ x 5.25″ box
- Weight: 2.1 lbs shipping weight
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