GSC Power-Division 2281-8 Exhaust Valves (29 mm STD) for 2015-2021 Subaru WRX

Vehicle Fitment

• 2015-2021 Subaru WRX (FA20F 2.0 L Turbo H4)

Features

• Premium performance exhaust valves for Subaru FA20F engines
• Swirl-polished valve heads for improved airflow and efficiency
• Back-cut design reduces valve weight for higher RPM capability
• Chrom-polished stem surface reduces drag and improves motion
• Made from high-strength 23-8N stainless steel for heat resistance
• Less valve distortion at the face for better sealing under load
• Allows more aggressive cam profiles without raising spring seat pressures
• Works with OEM locks or upgraded keepers for performance builds

Specifications

• Part Number: 2281-8
• Valve Type: Exhaust valves
• Head Diameter: 29 mm (standard size)
• Quantity: Set of 8 valves (one per cylinder)
• Material: Modified 23-8N stainless steel
• Valve Stem Diameter: ~5.5 mm
• Overall Length: ~97.9 mm
• Application: Subaru FA20F 2.0 L turbocharged engine

Included Components

• 8x Exhaust valves (29 mm standard head)

Product Description

The GSC Power-Division 2281-8 Exhaust Valves are a premium performance valve set engineered for the Subaru WRX equipped with the FA20F 2.0 L turbocharged engine (2015-2021). Built from robust 23-8N stainless steel, these exhaust valves are designed to withstand the high temperatures and demanding conditions of turbocharged performance engines. Swirl-polished valve heads improve airflow, and back-cut lightening enhances high-RPM capability without increasing spring seat pressures.

Each valve is CNC-finished with a chrom-polished stem to minimize drag and promote smooth movement within the valve guides, helping reduce wear and maintain performance consistency. The 29 mm standard-size head matches OEM dimensions, making this set a direct upgrade for stock or mildly modified FA20F engines. These valves are ideal for performance builds seeking improved durability and reliability under higher boost and elevated engine speeds.