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GSC P-D Subaru FA20 Viton 6mm Valve Stem Seal Set - Black Ops Auto Works
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GSC P-D Subaru FA20 Viton 6mm Valve Stem Seal Set

GSC1023
GSC1023
Valve Seals
20+ Units In Stock - Ships Next Business Day
$ 24.09 $ 20.48
$ 20.48

SKU: 1023

GSC P-D Subaru FA20 Viton 5.5mm Valve Stem Seal Set 2013-2021 BRZ STI FR-S 86

GSC Power-Division Viton valve stem seals fit Subaru FA20 engines in BRZ STI FR-S and 86 models providing exact 5.5mm stem sealing to control oil flow. These seals prevent oil from entering the combustion chamber supporting consistent power and reduced smoke during high-rev operation. Ideal for rebuilds or upgrades in performance Subaru FA20 applications.

Key Features

  • Viton Material: Fluorocarbon rubber withstands 400°F temperatures and resists fuels oils for extended service life in boosted or track engines
  • 5.5mm Stem Fit: Matches OEM FA20 valve dimensions for drop-in installation with zero clearance issues
  • Positive Seal Design: Twin-lip configuration meters oil precisely minimizing consumption and deposits on valves
  • Complete 16-Piece Set: Includes seals for all 16 valves (8 intake 8 exhaust) covering full DOHC FA20 cylinder head
  • High-Pressure Durability: Maintains seal integrity under 50psi crankcase pressure common in modified FA20 setups

Product Notes

  • Replace seals during every cylinder head removal for best results
  • Inspect valve guides for wear before installation
  • Standard ground shipping in protective packaging

Installation Notes

  • Professional installation recommended.
  • Remove valve springs and retainers to access stems
  • Use GSC seal driver tool or equivalent for even press-fit without damage

This Part Fits

Year Make Model Submodel
2013-2016 Scion FR-S All
2013-2020 Subaru BRZ All
2015-2021 Subaru WRX STI All
2017-2020 Toyota 86 All

Why Choose GSC Power-Division?

  • Motorsport-proven components used in championship-winning Subaru engines
  • USA-made with tight tolerances for repeatable performance
  • Direct engineering input from FA20 race teams for real-world reliability

Frequently Asked Questions

  • Q: Will this fit 2015-2021 Subaru STI FA20F turbo engines?
    A: Yes fits all 2015-2021 WRX STI models with FA20F 5.5mm valve stems including boosted applications
  • Q: What makes Viton better than stock seals?
    A: Viton handles higher heat and oil contamination without swelling or hardening extending seal life in performance FA20 builds
  • Q: Is special hardware needed for installation?
    A: Standard valve spring compressor and seal driver suffice no custom parts required compatible with OEM heads

Shipping & Handling

  • Method: Standard Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Compact box 1 x 5.75 x 7.75 inches
  • Weight: 0.13 lbs

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