QA1 Precision Products offers their Pro Coil systems to upgrade GM vehicles to a true coil-over suspension without any hassle – it’s designed to be a complete bolt-in and offer fully adjustable ride height and damper valving control. Now they’ve just added 600 and 650 lb./in. springs to their parts  assortment, offering better performance for heavier vehicles. The springs can be purchased as part of a Pro Coil kit or separately. Check out the details!

Official Release:

QA1 is excited to add 600 and 650 lb. spring rates for its front GM Pro Coil Systems. Made of hi-tensile chrome-silicon wire, these high travel springs require fewer coils which reduces weight up to 28% and increases travel up to 20% compared to conventional springs. Made in the USA, these 600 and 650 lb. springs provide performance-style handling and support vehicles with heavier front end weights. The 600 lb. spring will support vehicles with a front end weight between 2201-2300 lbs. and the 650 lb. spring will support vehicles with a front end weight between 2301-2400 lbs.

Features:

• Available for GM A, G and F-Bodies, Chevy S-10’s and Tri-5 Chevys
• Can be purchased separately or with QA1’s front GM Pro Coil System
• Silver powder coated for durability and good looks
• Available with pigtail or ground ends for consistent and accurate operation
• All QA1 springs come with a LIFETIME GUARANTEE to remain within 2% of their original free height and rate