Coil Spring - 2.5in x 7 400#

The Coil Spring - 2.5in x 7in 400# from QA1 is a crucial suspension component designed for drivers and mechanics who are building or upgrading independent rear suspension systems. This linear-rate coil spring is essential for modern suspension geometry, effectively managing vertical load transfer while maintaining a consistent spring rate throughout the suspension travel.

With a spring rate of 400 pounds and a free length of 7 inches, this QA1 spring offers a straightforward, non-progressive rate curve that is ideal for both street and competition applications. The 2.5-inch coil diameter allows for a compact design that fits well in space-constrained double-wishbone and multi-link suspension setups. QA1's rigorous manufacturing standards ensure that wire diameter and coil pitch are consistent, which is vital for accurate spring rate performance.

This spring is particularly beneficial for fabricators, restoration shops, and performance enthusiasts who are constructing IRS (independent rear suspension) systems for vintage and modern vehicles. Its predictable performance characteristics make it an excellent choice for precision suspension tuning, ensuring that drivers can achieve the desired handling and ride quality.