GSC Power Division 3064-8 Intake Valve Guides for Subaru FA20 FA24 BRZ WRX FR-S

Vehicle Fitment

• 2013-2021 Subaru BRZ (2.0L FA20D, RWD)
• 2013-2016 Scion FR-S (2.0L FA20D / 4U-GSE, RWD)
• 2017-2021 Toyota 86 (2.0L FA20D / 4U-GSE, RWD)
• 2022-2025 Toyota GR86 (2.4L FA24D, RWD)
• 2022-2025 Subaru BRZ (2.4L FA24D, RWD)
• 2015-2025 Subaru WRX (2.0L FA20F Turbo, AWD)

Fitment Notes

• Intake position only. For exhaust valve guides, see the corresponding GSC exhaust guide part number for your engine.
• This is the traditional smooth (non-stopper) style guide. For the stopper-style intake guide, see GSC part number 3106-8.
• Oversized variants (+0.001" and +0.003" OD) are sold individually under separate part numbers and are not included in this set.
• Fits FA20D (naturally aspirated) and FA20F (turbocharged WRX) and FA24D variants sharing the same 5.5mm valve stem diameter.

Features

• Manufactured from true C67410 Manganese Bronze for superior heat transfer and durability over OEM cast iron.
• CNC-turned on dedicated precision turning centers for industry-leading concentricity and tolerance control.
• True-to-size OD reduces guide boss honing requirements on cylinder heads in good condition.
• Shaped to improve airflow around the guide bore - not a simple OEM copy design.
• Tight through-hole concentricity minimizes required honing time during installation.
• Compatible with standard 5.5mm valve stems and all common valve stem seal options.
• Engineered specifically for the FA20/FA24 boxer-four cylinder head geometry.
• Trusted by engine builders for both street rebuilds and high-output motorsport applications.

Specifications

• Position: Intake
• Material: C67410 Manganese Bronze
• Total Length: 1.654" / 42.01mm
• Outer Diameter: 0.3964" / 10.07mm
• Valve Stem Diameter: 5.5mm
• Style: Traditional smooth (non-stopper)
• Application: Subaru FA20D, FA20F, FA24D DOHC Boxer-4

Included Components

• 8x GSC Manganese Bronze Intake Valve Guides (standard size)

Product Description

The GSC Power Division 3064-8 is a set of eight standard-size Manganese Bronze intake valve guides engineered for the Subaru FA20 and FA24 DOHC boxer-four engine family. This covers the naturally aspirated FA20D found in the first-gen BRZ, Scion FR-S, and Toyota 86, the turbocharged FA20F used in the 2015-2025 WRX, and the FA24D in the second-generation BRZ and GR86. Made from true C67410 Manganese Bronze, these guides outperform OEM cast iron in heat dissipation and wear resistance - key factors in both high-RPM naturally aspirated builds and boosted applications.

GSC machines these to some of the tightest tolerances in the industry on dedicated CNC turning centers, reducing bench time for the installer and minimizing guide boss honing on well-maintained heads. The smooth (non-stopper) design is the standard replacement style for these applications. Whether you're freshening a high-mileage street engine or doing a full performance head build, the 3064-8 is a proven upgrade over worn OEM guides.