Single Spring & Titanium Retainer Kit Suit Toyota / Subaru BRZ4UGSE, FA20

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 processingprocedures for consistent pressures. BC titanium retainers are CNC machined from 6AL4V round bar titanium to exacting tolerances.