Manufacturer's Part Number:
Summit Racing Part Number:
Coil-Over Spring Inside Diameter (in):
Coil-Over Spring Inside Diameter (mm):
Coil-Over Spring Length (in):
Coil-Over Spring Length (mm):
Progressive Rate Spring:
Coil-Over Spring Rate (lbs/in):
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QA1 coil springs are designed to withstand the high stress levels of modern suspensions. They're manufactured from high-quality chrome silicone steel, heat-treated and shot-peened, and then powdercoated or plated for protection and appearance. Each spring is guaranteed to be within five percent of its advertised rate.