Designed for high RPM, Brian Crower valve springs are wound from only the highest grade, super clean, chrome silicone alloy and feature proprietary processing procedures for consistent pressures. BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances. It is recommended that you upgrade valve springs whenever you change cams. Brian Crower valve train components are a great choice for your STI - they are top quality at an unbeatable price! Kit includes 16 single coil valve springs and 16 titanium retainers.
Seat: 1.420(in) @ 60 lbs, Open: 1.000(in) @ 160 lbs, Coil Bind: 0.860(in)
No machine work required.