Hyperco 3″ I.D. x 18″ Free Length Coilover Spring, E Series, 200-700 lbs/in Rate (Choose Rate)
$117.00
Hyperco 3″ I.D. x 18″ Free Length Coilover Springs — E Series

Hyperco high-performance E-series coilover springs in a 3″ (76.2 mm) inside diameter and 18″ (457.2 mm) free length. Precision cold-wound from high-tensile chrome-silicon wire, heat-treated, preset and 100% rate-tested, so the printed rate is the delivered rate. Lighter weight and more usable deflection than comparable springs, and made in the USA.
Select your spring rate from the drop-down. Every spring in this listing shares the same 3″ I.D. and 18″ free length; only the rate and its associated deflection, load and coil dimensions change. All dimensions are shown in both inches and millimeters.
Rate Chart
| SKU | Rate (lbs/in) | Max Deflection | Max Load (lb) | Outside Dia. | Solid Height |
|---|---|---|---|---|---|
| 1818E0200 | 200 | 11.909″ (302.5 mm) | 2381 | 4.368″ (110.9 mm) | 6.091″ (154.7 mm) |
| 1818E0225 | 225 | 11.707″ (297.4 mm) | 2634 | 4.407″ (111.9 mm) | 6.293″ (159.8 mm) |
| 1818E0250 | 250 | 11.473″ (291.4 mm) | 2868 | 4.474″ (113.6 mm) | 6.527″ (165.8 mm) |
| 1818E0300 | 300 | 10.856″ (275.7 mm) | 3257 | 4.204″ (106.8 mm) | 7.144″ (181.5 mm) |
| 1818E0350 | 350 | 10.38″ (263.7 mm) | 3632 | 4.331″ (110.0 mm) | 7.62″ (193.5 mm) |
| 1818E0400 | 400 | 10.008″ (254.2 mm) | 4003 | 4.318″ (109.7 mm) | 7.992″ (203.0 mm) |
| 1818E0500 | 500 | 9.255″ (235.1 mm) | 4372 | 4.455″ (113.2 mm) | 8.745″ (222.1 mm) |
| 1818E0600 | 600 | 9.339″ (237.2 mm) | 5603 | 4.456″ (113.2 mm) | 8.661″ (220.0 mm) |
| 1818E0700 | 700 | 8.958″ (227.5 mm) | 6270 | 4.52″ (114.8 mm) | 9.042″ (229.7 mm) |
Specifications
- Inside diameter: 3″ (76.2 mm)
- Free length: 18″ (457.2 mm)
- Series: E
- Rate range: 200–700 lbs/in
- 100% rate-tested, made in the USA
- Sold individually.








