Aeromotive Inc. is a true high performance aftermarket manufacturer specializing in fuel delivery and fuel delivery components. Utilizing aerospace tolerances and procedures, three generations of track experience, and a meticulous approach to engineering, Aeromotive Fuel Systems has become the absolute pinnacle of performance fuel delivery. P/N 13701 Spring Kit for Universal Bypass Regulator. Includes both High Pressure and Low Pressure Springs Genuine Aeromotive regulator service parts. Complete spring replacement kit. High pressure and low pressure springs included. Fits only Aeromotive Regulators including the following:  P/N 13301 and P/N 13351. Not for use in any other Aeromotive Bypass Regulator.