GSC 2012-8 36mm Intake Valves Set of 8 for 02-21 Subaru WRX/STI EJ

Vehicle Fitment

• 2002-2005 Subaru WRX (EJ205/EJ255)
• 2006-2007 Subaru WRX (EJ255)
• 2008-2014 Subaru WRX (EJ20/EJ25)
• 2004-2021 Subaru WRX STI (EJ257)
• 2004-2008 Subaru Forester XT (EJ25)
• 2005-2009 Subaru Legacy GT (EJ25)
• 2007-2009 Subaru Legacy GT Spec B (EJ25)
• Additional Subaru EJ20/EJ25 turbocharged engines requiring 36 mm intake valves

Features

• Set of 8 high-quality intake valves from GSC Power-Division
• 36 mm standard head diameter for increased airflow vs stock valves
• Chrome-polished stems reduce friction and guide wear
• Swirl-polished heads improve airflow efficiency and performance
• Back-cut design reduces valve weight for higher RPM capability
• Modified 21-4N stainless steel material optimized for strength
• Micro-polished stems help reduce oil drag for smoother valvetrain motion
• Enhanced valve tip treatment improves durability under load

Specifications

• Brand: GSC Power-Division
• Part Number: 2012-8
• Valve Type: Intake
• Quantity: Set of 8 valves
• Head Diameter: 36 mm (standard size)
• Material: Modified 21-4N stainless steel
• Finish: Chrome-polished stems and swirl-polished heads
• Application: Subaru EJ20/EJ25 turbocharged engines

Included Components

• 1x Set of 8 intake valves (36 mm)
• Note: Valve springs, retainers, seals, and keepers are not included

Product Description

The GSC 2012-8 intake valve set from GSC Power-Division includes 8 precision-manufactured valves engineered for turbocharged Subaru EJ20 and EJ25 engines. Each valve features a 36 mm head diameter that improves airflow potential compared to stock valves, ideal for builds with increased boost, higher RPM operation, or performance camshaft upgrades. Chrome-polished stems and swirl-polished heads work together to reduce friction and enhance airflow for better engine response and durability.

Designed as a direct replacement for Subaru WRX and WRX STI models from 2002-2021 (and various EJ20/EJ25 turbo applications including Forester XT and Legacy GT), this valve set is suitable for engine rebuilds, performance refreshes, and high-output builds. The back-cut design reduces overall valve weight, helping with valvetrain stability at high RPM. Professional installation with proper valve springs and seals is recommended to maximize performance and longevity.