Pro-Street Rear C/O Shock Kit

The QA1 Pro-Street Rear C/O Shock Kit is a premium coil-over suspension solution engineered for enthusiasts who demand both performance and adjustability in their rear suspension geometry. This twin-tube design delivers the refined handling characteristics necessary for street-driven vehicles that require responsive damping without sacrificing comfort. Built for vehicles in the 1301–1550 lb weight range, this rear-only shock kit addresses the specific needs of custom builds, restorations, and performance upgrades where precise suspension tuning is essential.

The Pro-Street rear shock features single-adjustable damping control, allowing users to fine-tune compression and rebound characteristics to match their driving style and road conditions. The progressive spring rate of 130–250 lb/in provides a smooth initial response while ramping up support under load, delivering a balance between compliance over bumps and resistance during cornering or acceleration. Twin-tube construction ensures reliable heat dissipation and consistent performance across extended driving sessions, while the coil-over configuration grants independent ride height adjustment for both cosmetic stance and functional geometry tuning.

This kit is ideal for street rods, classic car restorations, and street performance vehicles where rear-only coil-over conversion is the preferred upgrade path. The adjustable nature of the shock allows builders to compensate for suspension geometry changes, weight distribution shifts, or driver preference refinements without replacing the entire assembly. Professional installation is recommended to ensure proper alignment, spring seating, and damper calibration specific to your vehicle's intended use.