These are the best quality springs ever made for Mustangs. The spring rate becomes stiffer as they are compressed. These premium quality springs are CNC cold wound from chromo-silicon spring wire, stress relieved, shot peened, pre-cycled(sag proof), ground flat ends, and epoxy powder paint coated dark blue. These springs will give a firm, but stock like ride under normal conditions, but will give race car handling under severe cornering and braking conditions.
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