Brian Crower K-Series Valve Springs/Retainers: Titanium Retainer/Spring Seats (06-11 Civic Si)

Designed for high rpm, BC valve springs by PAC Racing 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. Use steel retainer for high mileage applications.

Dual spring, titanium retainer/seat for high lift cams (BC0047/BC0047-2)

Spring Pressure: BC1040T Seat: 1.590" @ 80 lbs / Open: 1.020" @ 215 lbs / Coil Bind: .870" (no machine work required)