Brian Crower BC2904 Spring Seats Honda K20A2 K20Z3 F20C F22C
Brian Crower Valve Spring Seats are shims that sit below each spring to allow spring rotation during extreme coil bind. If the spring cannot rotate at its extreme limit, it may expand and come off the retainer. To prevent that, it is important to have proper valve spring seats in place.
Highest quality spring seats, CNC machined to exacting tolerances and designed to deliver added rpm potential prior to valve float.