Ferrea's Copper Bronze Valve Guides are made for your Subaru WRX and STI. The 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.
SUBARU IMPREZA WRX STI (2004 - 2016) WRX (2002-2014) EXHAUST, +.001 Over size
Specifications: Exhaust +.001 Over size. Use Ferrea Valve Seal Part# VS1015.
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