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The Turbosmart 57mm vacuum spring rated at 4 inHg is a replacement spring for compatible 57mm wastegate assemblies. Specified by diameter and vacuum rating, this spring influences actuator response and valve opening under vacuum conditions. It is intended for use when servicing or tuning wastegate actuation; confirm that the 57mm 4 inHg spring matches your particular wastegate model before installation.
Turbosmart 57mm Vacuum Spring 4inhg
