Coil-Over Hot Rod Spring 7in x 300#

The AFCO Racing Products Coil-Over Hot Rod Spring 7in x 300# is a purpose-built suspension component engineered for street rods, custom hot rods, and dedicated performance vehicles that demand progressive spring rates and ride height adjustability. This coil-over spring delivers the linear force curve that serious builders expect when tuning independent front or rear suspension geometry, replacing traditional leaf-spring setups with modern damping control and adjustable ride height for precise chassis tuning.

With a 300-pound spring rate and 7-inch working length, this coil-over spring is calibrated for mid-weight hot rod platforms and custom builds where driver-adjustable suspension geometry is critical. The 300# rate sits in the sweet spot for vintage V8 applications and modern LS-swap hot rods, providing enough stiffness to control body roll and dive without sacrificing ride comfort on varied road surfaces. AFCO's racing-grade manufacturing ensures consistent load values across the spring's travel, eliminating the inconsistency common to aged or mismatched OEM springs; the compact 4.3 x 4.1-inch coil diameter allows tight packaging in modern coil-over shock towers while the 2.38-pound weight keeps unsprung mass minimal.

Hot rod and custom car builders benefit most from this spring when pairing it with adjustable coil-over shocks to dial in corner weights, brake balance, and weight transfer characteristics for street or weekend track duty. It is compatible with AFCO and most aftermarket coil-over shock bodies featuring standard 2.5-inch to 3-inch spring seat diameters; verify your shock manufacturer's spring seating specifications before installation. Suspension tuners and experienced DIY builders can optimize handling and stance by experimenting with spring rates across all four corners, making this 300# spring ideal for progressive builds where suspension geometry is iteratively refined.