JEGS HEI Advance Curve Kit

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JEGS HEI Advance Curve Kit is designed for coil-in-cap type distributors in GM V8 without computer control. Optimizes ignition timing for maximum horsepower and acceleration. Includes three sets of advance springs (to custom tailor how quickly full advance is reached), a unique center pivot plate, two advance weights and two pair of nylon bushings. Includes detailed instructions.