GSC Exhaust Valve Guide Set 8 Subaru WRX 2015-2021 / Scion FR-S 2013-2016 / BRZ 2013-2021 Wheel Offset_15mm Build times vary by model

Build times vary by model of turbo and options of said turbocharger

great modification for anyone running higher boost pressures or higher horsepower

Green and White

Single bleed adjuster

Cool down your motor before heat build up

GSC Exhaust Valve Guide Set 8 Subaru WRX 2015-2021 / Scion FR-S 2013-2016 / BRZ 2013-2021 Wheel Offset_15mm Build times vary by modelPart #: 3063 8 What we have done is actually quite simple, we made valve guides that fit properly, are easier to install, and shaped to help air flow instead of just copying the OEM design. The GSC Power Division valve guides are made from true C67410 Manganese Bronze and turned on a dedicated precision CNC turning center. What this means for you and your installer is less time fitting guides to the head due to holding the tightest tolerances in the