Eibach ERS Helper Spring 3.75in Dia 6.07in Length 45 lbs/in (HELPER375)
The Eibach ERS Helper Spring HELPER375 is a heavy-duty, large-diameter helper spring engineered to maintain main-spring position during full suspension droop while preserving the primary spring's rate and travel. With a high 45 lb/in helper-spring rate and a long 6.07-inch free length, this model is ideal for off-road, long-travel, and high-load coilover systems that require stronger preload control and extended helper-spring travel.
Its flat-wire construction compresses to a compact block height, maximizing usable suspension travel while ensuring the main spring stays properly seated. Each spring is individually tested for accuracy, rate consistency, and long-term durability - core attributes of Eibach's ERS program.
Specifications
- Part Number: HELPER375
- Configuration: Single helper spring
- Length: 6.07 in (154.00 mm)
- Diameter: 3.75 in I.D. (95.00 mm I.D.)
- Rate: 45 lbs/in (0.80 kg/mm)
- Block Height: 1.38 in (35.00 mm)
- Travel: 4.69 in (119.00 mm)
- Block Load: 253 lbs (1126 N)
- Weight: 1.90 lbs (0.86 kg)
Features
- High-rate flat-wire helper spring for demanding coilover applications
- Keeps main spring seated when suspension is fully unloaded
- Minimal block height for maximum usable suspension travel
- Does not interfere with main spring rate or performance
- Each spring is individually tested for accuracy and consistency
- Backed by Eibach's five-year warranty
Notes
- Ideal for heavy-duty, long-travel, or high-preload coilover systems
- Verify 3.75in I.D. compatibility with your coilover hardware
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