These polished and chrome plated springs fit perfectly with QA1's Mustang II Pro Coil Kits. With a 3.5" upper I.D. and 2.5" lower I.D., these springs are offered in four rates with an 8" free length. Made with the highest quality materials, QA1 springs are strong, consistent and have a long life. All QA1 springs come with a lifetime guarantee to remain within 2% of their original free height and rate, so you know you're getting quality springs with QA1.

Chrome Silicon Steel (CrS)

All QA1 springs are manufactured using the highest quality materials for high strength, consistency and long life.

Cold Wound-Heat Treated-Shot Peened

All QA1 springs go through intensive manufacturing processes to ensure consistency, accuracy and durability.

Squared Ends

All QA1 springs are ground at both ends to ensure straight, consistent and accurate operation.

Protective Coated

The Mustang II Springs are polished and chrome plated for the ultimate in appearance.

Lengths and Rates Marked

All QA1 springs are clearly marked with the free length of the spring and spring rate for quick and easy identification.

Lifetime Guarantee

All QA1 springs are lifetime guaranteed to remain within 2% of the original free height and rate under normal operating conditions.

SPRING RATE INFORMATION:
The information below is a general guideline for selecting spring rates for QA1's Mustang II Front Pro Coil Shock Systems. Spring rates may vary depending on applications, usage and personal preference.

Front Axle Weight In LBS.

• <1350 - 375 lb spring
• 1350-1525 - 500 lb spring
• 1525-1700 - 600 lb spring
• 1700+ - 700 lb spring