Conv Rear Spring 5in x 13in x 250#

The Conv Rear Spring 5in x 13in x 250# from AFCO Racing Products is a purpose-built coil spring engineered for high-performance suspension tuning on drag racing, circle track, and street performance vehicles. This conventional rear spring delivers precise rate control and consistent damping characteristics essential for competitive motorsports and serious enthusiasts seeking reproducible handling and launch control. The 250-pound spring rate makes it ideal for rear-axle applications where predictable load response and minimal deflection under acceleration are critical to vehicle dynamics and consistency.

AFCO's manufacturing standards ensure this coil spring maintains its rate specification across thousands of cycles without loss of preload or performance degradation. The 5-inch free length and 13-inch compressed dimension are tailored for aftermarket rear suspensions and custom fabricated mounting points, allowing builders to dial in exact ride height and spring rate combinations for their specific application. At 250 pounds per inch, this spring provides firm support suitable for weight transfer management during hard acceleration, cornering loads, and consistent traction management on prepared surfaces.

This rear spring suits tube-frame dragsters, modified circle-track cars, and custom street rods where suspension geometry has been engineered for independent spring installation. The compact 7.15-pound weight and OEM-quality construction make it an excellent choice for builders pairing it with adjustable shocks, link bars, or four-link setups requiring precise rate matching. Proper installation requires confirming mounting pocket dimensions and ensuring spring seats are parallel; consult your chassis builder or suspension engineer to confirm compatibility with your specific suspension design and desired ride frequency.