SKU: 1800.375.0250S | UPC: 803050446183
Eibach ERS 18.00 in. Length x 3.75 in. ID Silver Coil-Over Spring – Universal Coilover Fit
The Eibach ERS 18.00 in. Length x 3.75 in. ID Silver Coil-Over Spring delivers a precise 250 lb/in rate for coilover suspension systems in racing and street performance applications. This universal spring fits most strut-style coilovers with 3.75″ ID perches, providing consistent damping control and handling response. Built for track demands, it maintains shape under high loads for reliable lap times.
Key Features
- 18.00″ Free Height: Allows full suspension travel in tall coilover setups for drag racing, autocross, or road course use.
- 3.75″ Inside Diameter: Matches standard coilover perches on strut shocks for secure, centered installation.
- 250 lb/in Spring Rate: Balances stiffness and compliance for sharp cornering and stability at speed.
- Silver Powder Coat Finish: Identifies 200-299 lb/in rates while resisting corrosion in harsh environments.
- Chrome Silicon Steel Construction: Shot-peened, stress-relieved, and nitrogen-infused for fatigue resistance and long service life.
Product Notes
- Sold individually; order pairs for front or rear applications.
- Inspect spring seats and rubbers for proper seating during assembly.
- Standard ground shipping; heavy item may incur freight surcharge on LTL.
Installation Notes
- Professional installation recommended.
- Compress spring with rated coilover compressor tool rated for 3.75″ ID.
- Compatible with most adjustable coilover perches; verify OD 4.64″ clearance.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | All | Coilover Strut Systems | 3.75″ ID Perch |
| Universal | BMW | M3 E46/E92 | Custom Coilover Builds |
| Universal | Honda | Civic EG/EK | Race Coilovers |
| Universal | Miata | NA/NB | Strut Coilovers |
Why Choose Eibach?
- Trusted by factory race teams in Formula Drift, NASA, and SCCA.
- High-tensile chrome silicon steel exceeds SAE standards for consistency.
- Precision wound on CNC machines in the USA for exact rate tolerance.
Frequently Asked Questions
- Q: Does this spring fit my coilover shock?
A: Yes, designed for any coilover with 3.75″ ID perch and sufficient height clearance; check shock body diameter against 4.64″ OD. - Q: What material and treatments are used?
A: Premium chrome silicon high-tensile steel, 100% shot-peened for strength, heat-treated, and nitrogen gas infused to prevent sagging. - Q: What is the warranty and wire diameter?
A: Lifetime warranty against manufacturing defects; 0.890″ wire diameter for high load capacity.
Shipping & Handling
- Method: Standard Ground
- Availability: In stock – ships same or next business day
- Packaging: Protective cardboard tube, 20″ x 6″ x 6″
- Weight: 6.1 lbs
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