FA20 / 4UGSE Valve Spring & Retainer Kits
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.
Single spring, titanium retainer/seat
Dual spring, titanium retainer/seat
Spring Pressure: BC1650 Seat: 1.320" @ 85 lbs / Open: 0.930" @ 168 lbs / Coil Bind: 0.775" (no machine work required)
Spring Pressure: BC1651 Seat: 1.320" @ 90 lbs / Open: 0.900" @ 220 lbs / Coil Bind: 0.765" (no machine work required)