GSC P-D Viton 6mm Valve Stem Seal Set Subaru WRX 2015-2021 | 1023

Product Fitment:

2015-2021 Subaru WRX

Optimize your Subaru WRX engine’s reliability with this premium set of Viton valve stem seals from GSC Power-Division. These seals are crafted from high-temperature fluoroelastomer material to withstand the added heat and stress that comes with performance driving. Sold as a complete set of 16 (intake & exhaust), this upgrade is ideal when performing a valvetrain overhaul, installing aftermarket springs, or simply replacing aging OEM seals.

Key Features:

• High-Temperature Viton Material: Engineered to cope with elevated engine bay and combustion temperatures, providing longer service life than standard seals.

• Full Engine Set (16 Seals): Includes both intake and exhaust stem seals for all cylinders-one-stop solution for rebuilds or upgrades.

• Performance-Ready Upgrade: Ideal when using high-rev, turbo, or track-oriented builds where reliable sealing and low oil consumption matter.

• Improved Sealing Performance: Better resistantce to heat, oil, and wear helps prevent blow-by, oil burning past seals, and ensures smoother engine behavior.

Over time and under performance conditions, factory valve stem seals can harden, crack, or leak-leading to oil entering the combustion chamber, increased emissions, and potential power loss. Replacing them with high-performance Viton seals secures the integrity of the valvetrain, supports longer service intervals, and gives you peace of mind as you push your FA/FB engine build.