Ferrea's Copper Bronze Valve Guides are made for turbo application Subaru's including the WRX and STI. Our high quality copper-bronze blended alloy valve guide is developed with proprietary heat treatment processes allowing for greater heat dissipation, heat resistance, and lubricity properties for the next generation of high performance race engines.
Specifications: Intake Standard Size. Use Ferrea Valve Seal Part# VS1016.
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