QA1 10CS275 Coil-Over Spring 2.5" I.D. 10" 275 lb/in Chrome

The QA1 10CS275 is a 275 lb/in rate, 10-inch free length, 2.5" I.D. chrome-plated coil-over spring designed for high-performance street and racing suspension applications. Built to exacting standards, this spring delivers the consistent, predictable linear rate that performance builders demand.

Key Features:

• Spring Rate: 275 lbs/inch (linear)
• Free Length: 10 inches
• Inner Diameter (I.D.): 2.5 inches — compatible with standard 2.5" coil-over hardware
• Finish: Chrome plated for corrosion resistance and a clean appearance
• Material: High-tensile chrome silicon alloy steel wire — the highest-grade spring steel available
• Manufacturing Process: Cold wound, heat treated, and shot peened for maximum consistency and fatigue life
• Squared & Ground Ends: Both ends are ground flat for straight, accurate seating and operation
• Clearly Marked: Free length and spring rate are stamped on the spring for quick identification
• Made in the USA

QA1 coil-over springs feature a linear rate design that maintains a consistent spring rate throughout the entire compression stroke, delivering predictable handling in all driving conditions — from street cruising to autocross to drag racing. The chrome silicon steel construction and fewer coil design maximizes suspension travel while reducing unsprung weight, allowing the suspension to react faster and optimize performance.

All QA1 2.5" I.D. chrome coil-over springs are backed by a lifetime guarantee to remain within 2% of their original free height and spring rate under normal operating conditions. This spring is sold individually.