GSC Intake Valve Guides Stopper Style - Subaru WRX 2002-2014 / STi 2004-2020 (+Multiple Fitments) Audi-A4-2018 (1) Catch can mount

(1) Catch can mount

Platinum pad at ground electrode for even wear in DIS ignition systems

V-band mid-pipe connection for a leak free seal

Maximum Differential Fuel Pressure – 7

GSC Intake Valve Guides Stopper Style - Subaru WRX 2002-2014 / STi 2004-2020 (+Multiple Fitments) Audi-A4-2018 (1) Catch can mountWhat they have done is actually quite simple, they 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 industry