The Street Performer Springs will control your valves up to 5,500 RPM, with a valve lift of .450".
NOTE: The proper set of matched valve train components will eliminate most valve train problems. The LC Engineering Street Performer Valve Springs for the 3VZ engines require the use of our Street Performer Retainers, see Part #: 1023239. Sold as a set of (12).
Contact our Tech Support Line for further information at 928-855-6341.