GSC Power-Division Exhaust Valve Guides Stopper Style 2015-2021 WRX / 2013-2021 BRZ

GSC Power-Division makes valve guides that fit properly, easier to install and shaped to help air flow instead of just copying the OEM design. GSC's valve guides are made from true C67410 Manganese Bronze and turned on a dedicated precision CNC turning center creating some of the tightest tolerances in the industry with the best quality control possible.

Sold in a set of 8