Conv Rear Spring 5in x 11in x 225#

The Conv Rear Spring 5in x 11in x 225# from AFCO Racing Products is a conventional coilover rear suspension spring engineered for performance vehicles, drag racing platforms, and custom automotive builds. This spring is designed for drivers and mechanics who demand precise weight distribution and load control in rear suspension geometry, whether you're tuning a street car for better handling or dialing in a competition vehicle for consistent launch characteristics. AFCO Racing Products has built its reputation on manufacturing suspension components that deliver measurable improvements in ride quality, weight transfer control, and overall chassis dynamics.

This conventional rear spring features a 225-pound spring rate, a 5-inch coil diameter, and an 11-inch free length—specifications that allow for controlled compression and rebound cycles under both street and track conditions. The 225# rate makes this spring ideal for mid-weight to lightweight vehicles or as part of a fully tuned suspension package where front and rear spring rates are matched for optimal anti-squat and weight transfer behavior. The compact 5-inch diameter enables fitment in tight chassis environments without sacrificing damping effectiveness, while the measured free length ensures proper ride height and load-carrying capacity across a variety of ride heights and lowering applications.

This component benefits drag racers, autocross competitors, and enthusiasts building dedicated track cars or street performance platforms where suspension tuning directly impacts acceleration, cornering, and braking performance. Proper spring rate selection requires matching to vehicle curb weight, intended load distribution, and your paired shock absorbers—AFCO springs are commonly paired with quality coilover shocks or traditional shock absorbers depending on your setup. Installation requires basic suspension knowledge or professional installation to ensure correct ride height, alignment, and spring preload; compatibility varies by vehicle chassis, so confirm mounting points and available clearance before purchase.