Hyperco 18SN-350 Conventional Coil Spring OD Length lb/in - 5 11 350

The Hyperco 18SN-350 is a high-performance conventional coil spring engineered for motorsports applications including street stock, hobby stock, and dirt modified racing. This SN-Series spring features a 5-inch outer diameter, 11-inch free length, and a 350 lb/in spring rate, providing 7.576 inches of maximum travel for optimal suspension performance.

Key Features:

• 5-inch outer diameter conventional design
• 11-inch free length with 350 lb/in spring rate
• 7.576 inches of maximum travel capability
• High-tensile strength chrome silicone steel construction
• Closed ends ground flat for proper seating
• Blue powder coat finish for corrosion resistance
• Dynamic Travel Response (DTR) enhancement technology
• Designed to fit standard coil-over hardware

Hyperco's SN-Series springs utilize their proprietary Dynamic Travel Response enhancement, allowing the spring to exceed performance requirements for travel and rate linearity while maintaining reduced physical weight. The closed-end design creates more active coils during compression, resulting in a progressive spring rate through the initial stages of deflection. This conventional rear spring is ideal for racers seeking reliable, high-performance suspension components.