Hyperco 3.75″ I.D. x 8″ Free Length Coilover Spring, G Series, 150-500 lbs/in Rate (Choose Rate)
$134.00
Hyperco 3.75″ I.D. x 8″ Free Length Coilover Springs — G Series

Hyperco high-performance G-series coilover springs in a 3.75″ (95.2 mm) inside diameter and 8″ (203.2 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, made in the USA.
Select your spring rate from the drop-down. Every spring in this listing shares the same 3.75″ I.D. and 8″ 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 | Color |
|---|---|---|---|---|---|---|
| 188G0150 | 150 | 6.22″ (158.0 mm) | 933 | 4.648″ (118.1 mm) | 1.78″ (45.2 mm) | Silver |
| 188G0200 | 200 | 6.055″ (153.8 mm) | 1211 | 4.78″ (121.4 mm) | 1.945″ (49.4 mm) | Silver |
| 188G0250 | 250 | 5.894″ (149.7 mm) | 1473 | 4.863″ (123.5 mm) | 2.106″ (53.5 mm) | Silver |
| 188G0300 | 300 | 5.777″ (146.7 mm) | 1733 | 4.939″ (125.5 mm) | 2.223″ (56.5 mm) | Silver |
| 188G0350 | 350 | 5.738″ (145.7 mm) | 2008 | 4.78″ (121.4 mm) | 2.262″ (57.5 mm) | Silver |
| 188G0400 | 400 | 5.615″ (142.6 mm) | 2246 | 4.822″ (122.5 mm) | 2.385″ (60.6 mm) | Silver |
| 188G0450 | 450 | 5.506″ (139.9 mm) | 2478 | 4.86″ (123.4 mm) | 2.494″ (63.3 mm) | Silver |
| 188G0500 | 500 | 5.363″ (136.2 mm) | 2682 | 4.9″ (124.5 mm) | 2.637″ (67.0 mm) | Silver |
Specifications
- Inside diameter: 3.75″ (95.2 mm)
- Free length: 8″ (203.2 mm)
- Series: G
- Rate range: 150–500 lbs/in
- Finish: Silver powder-coat
- 100% rate-tested, made in the USA
- Sold individually.






