Brian Crower Spring + Steel Retainers Subaru WRX / STI EJ205/EJ257 2002-2021 vendor_Skunk2 Fully CNC machining in-house from

Fully CNC machining in-house from 4140 chromoly alloy for different applications

The undercut stem above the head area also reduces weight and significantly improves air/fuel flow in and out of the combustion chamber

Photo may vary from actual product

this mod does not cause any permanent changes to your WRX

Brian Crower Spring + Steel Retainers Subaru WRX / STI EJ205/EJ257 2002-2021 vendor_Skunk2 Fully CNC machining in-house fromPart #: BC0600S The Brian Crower Single Spring Steel Retainer Kit is a great addition for those of you planning buiding your head, or adding a set of aggressive cams. These are designed for high RPM applications and are crafted from high grade, chrome silicone alloy.? Kit includes 16 single coil valve springs and 16?steel retainers. Spring Pressure: Seat: 1. 420(in) @ 60 lbs, Open: 1. 000(in) @ 160 lbs, Coil Bind: 0. 860(in) No machine work required.