QA1 15HTFB300 High Travel Coil Spring 2.5" ID 15" Length 300 lb/in Chrome Silicon

The QA1 15HTFB300 is a high-performance coil spring engineered for demanding suspension applications. This 15-inch long spring features a 2.5-inch inner diameter and a 300 lb/in spring rate, making it ideal for performance vehicles, race cars, and custom suspension builds where precise handling characteristics are critical.

Advanced Chrome Silicon Construction:

Manufactured in the USA from high-tensile chrome silicon alloy spring wire, this spring utilizes specially designed material that allows for fewer coils and smaller wire diameter compared to conventional springs. The result is a lighter spring with significantly increased travel due to greater coil spacing, reducing unsprung weight and improving suspension response time.

Key Features:

• 2.5-inch inner diameter with 15-inch free length
• 300 lb/in spring rate for predictable, consistent performance
• Silver powder coated finish for corrosion resistance and attractive appearance
• Ground ends on both sides for straight, accurate operation
• High travel design with increased coil spacing for extended compression range
• Can be compressed to coil-bind without affecting spring rate or free height
• Reduced weight compared to conventional springs minimizes unsprung mass
• Premium heat-treating and post-processing for extended fatigue life

Quality Guarantee:

QA1 backs these high travel springs with a lifetime guarantee to remain within 2% of the original free height and spring rate under normal operating conditions. The chrome silicon alloy construction and careful manufacturing processes ensure reliable, long-lasting performance in both street and competition environments.