GSC Power Division Exhaust Valve Guide

2017–2020 Toyota 86 / 2013–2020 Subaru BRZ / 2013–2016 Scion FR-S

3105.001-1

Overview:

The GSC Power Division Exhaust Valve Guide is a precision-engineered replacement component designed specifically for the Subaru FA20 engine found in the Toyota 86 (2017–2020), Subaru BRZ (2013–2020), and Scion FR-S (2013–2016). This +.001 inch oversize stopper valve guide ensures a tighter fit and enhanced durability compared to factory parts, helping to maintain optimal valve alignment and reduce wear under high-performance conditions.

Ideal for enthusiasts and tuners who demand reliability and longevity from their engine’s valvetrain, this valve guide supports increased valve stability and consistent exhaust flow. Whether you’re upgrading your engine for spirited street driving or track use, this component helps maintain precise valve operation and engine efficiency.

Key Features:

Engineered with performance and durability in mind, the GSC Power Division Exhaust Valve Guide offers the following benefits:

• +.001 inch oversize dimension for a precise, interference fit that reduces valve wobble and wear
• Manufactured from high-quality materials to withstand elevated temperatures and stresses of the exhaust cycle
• Designed specifically for the Subaru FA20 engine platform, ensuring perfect compatibility and fitment
• Improves valve sealing and alignment, contributing to consistent exhaust flow and engine performance
• Single valve guide included, allowing for targeted replacement or upgrade of worn components
• Supports enhanced engine reliability during high RPM and aggressive driving conditions
• Ideal for rebuilds, performance upgrades, or maintenance of factory engines

Construction & Design:

The valve guide is precision-machined to exact tolerances, providing a superior fit over stock components. Its oversize +.001 inch dimension ensures a tighter interference fit with the valve stem, which minimizes lateral movement and reduces the risk of valve guide wear or valve stem damage. This design choice enhances the longevity of the valvetrain and maintains optimal valve timing and sealing.

Constructed from durable materials capable of withstanding the harsh thermal environment of the exhaust port, the guide maintains structural integrity even under prolonged high-temperature operation. This makes it an excellent choice for performance builds and engines subjected to increased stress.

Installation & Fitment:

This exhaust valve guide is a direct fit replacement for the Subaru FA20 engine found in the specified Toyota 86, Subaru BRZ, and Scion FR-S model years. It installs using factory mounting points and requires standard engine rebuild procedures for valve guide replacement.

Professional installation is recommended to ensure proper press-fit and alignment. No modifications to the cylinder head or valve components are necessary beyond standard machining and fitting practices associated with valve guide replacement.

What's Included:

• One (1) +.001 inch oversize stopper exhaust valve guide

Ideal For:

This valve guide is perfect for:

• Engine rebuilders and mechanics performing maintenance or upgrades on Subaru FA20 engines
• Performance enthusiasts seeking enhanced valvetrain durability for track or spirited driving
• Owners of Toyota 86 (2017–2020), Subaru BRZ (2013–2020), and Scion FR-S (2013–2016) looking to replace worn or damaged valve guides
• Those upgrading their engine components to support higher RPM and increased power output

GSC Power Division specializes in high-performance camshafts and valvetrain components for import engines, including Subaru, Mitsubishi, Toyota, and Nissan models. Their products are designed to enhance engine performance in both street and race applications, offering improved mid-range and top-end power without sacrificing low-end torque.