GSC P-D Exhaust Valve Set +1mm (30mm) Subaru BRZ / Scion FR-S / Toyota 86 2014-2020 | 2133-8

Fitment:

• Subaru BRZ (2014-2020)

• Scion FR-S (20142-016)

• Toyota 86 (2017-2020)

The GSC Power-Division +1 mm Exhaust Valve set is engineered for the FA20 engine found in the Subaru BRZ, Scion FR-S, and Toyota 86. Designed with a 30 mm head diameter and precision 5.5 mm stem, these valves significantly improve exhaust flow while maintaining strength under extreme temperatures and high RPMs.

Each valve is crafted from premium 23-8n stainless steel with swirl-polished heads, back-cut design, and micro-polished stems for reduced friction and superior airflow. The hardened or Stellite-tipped ends extend longevity, making them ideal for both turbocharged and naturally aspirated high-performance engines.

Key Features:

• +1 mm oversized valve head for increased exhaust flow

• 23-8n stainless steel construction for high-temperature durability

• Swirl-polished head and back-cut design for maximum efficiency

• Micro-polished stems reduce drag and wear

• Hardened tips for extended life under high spring pressures

• Compatible with OEM or upgraded springs and retainers

• Ideal for high-revving or forced-induction FA20 builds

These valves are perfect for builders seeking improved performance, reliability, and flow efficiency without sacrificing drivability or long-term endurance.