Description
If you’re tuning a rear suspension for precise handling and consistent load control, spring rate is everything—and this Hyperco coil spring delivers the stiffness you need without sacrificing ride quality. The 300 lb/in rate strikes a balance between supporting your vehicle’s weight and maintaining compliance over track imperfections, making it ideal for road racing, autocross, and performance street applications. At 12 inches tall with a compact 5.5-inch ID, it’s engineered to fit tight-quarters rear suspension designs where space is limited.
- Spring Type: Coil
- Design: Conventional
- Outside Diameter: 5.5 in
- Length: 12 in
- Spring Rate: 300 lb/in
- Configuration: Single pigtail
- Application: Rear suspension
- Finish: Black paint
- Unit: Each spring
- MPN: 18SNP12-300






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