Conv Rear Spring 5in x 13in x 200#

The Conv Rear Spring 5in x 13in x 200# by AFCO Racing Products is a high-performance coil spring engineered for drag racing, circle track, and street performance applications where precise suspension geometry and load control are critical. This conventional-mount rear spring is designed for vehicles requiring medium-rate spring force to manage weight transfer during acceleration, braking, and cornering. Whether you're building a dedicated race car or upgrading a street machine, this 200-pound-rate spring delivers the predictable, linear load characteristics that serious enthusiasts demand for suspension tuning and chassis dynamics.

Built to AFCO's racing-grade standards, the Conv Rear Spring features a 5-inch free length and 13-inch compressed design, optimized for OEM and aftermarket rear suspension housings commonly found in muscle cars and race-prepared vehicles. The 200-pound spring rate (measured in pounds of force per inch of compression) provides mid-range stiffness ideal for balancing ride compliance with load-carrying capacity—critical for maintaining consistent chassis attitude during hard launches and sustained cornering loads. AFCO's manufacturing precision ensures coil concentricity and consistent rate across the spring's working range, eliminating the soft spots that plague inferior springs and compromising consistent suspension response.

This rear spring suits drivers upgrading factory suspensions on classic and modern performance platforms, particularly those running drag radials, slicks, or competition compounds where controlled weight transfer directly impacts ET and consistency. The compact 5.5-pound weight keeps unsprung mass minimal, improving ride quality and allowing faster suspension articulation. Installation pairs best with complementary front spring rates, quality dampers, and proper ride height adjustment—consult your chassis builder or suspension tuner to ensure this 200# rate matches your vehicle's weight distribution, intended purpose, and track conditions for optimal performance and longevity.