QA1 Coil Spring 2.5in ID x 12in Black 12HT150B

A coil spring's job is straightforward: manage suspension geometry and control ride quality under load. The QA1 12HT150B delivers a 150 lb/in spring rate in a compact 2.5-inch bore, making it ideal for vehicles running coil-over setups where precise spring rates are critical for handling, consistency, and driver feedback. Whether you're tuning a track car or fine-tuning street performance, this spring gives you the stiffness you need without unnecessary complexity.

QA1 springs are manufactured to tight tolerances and backed by decades of racing application—meaning you get predictable, repeatable performance lap after lap.

• 2.5-inch inner diameter
• 12-inch total length
• 150 lb/in spring rate
• Black powder coat finish
• Coil-over compatible
• Sold individually