Ferrea F6338 6000 Series Intake Valves 36mm +1mm Subaru FA20

The Ferrea F6338 is a high-performance intake valve set designed specifically for Subaru FA20 engines. This set includes 8 intake valves featuring a 36mm head diameter, 5.46mm stem diameter, and 103.45mm overall length with a +1mm oversize head. The valves feature a 10-degree S-Flo flat head design for improved airflow characteristics.

Key Features:

• Two-step slow forging process using EV8 stainless steel for excellent reliability in high spring pressure and roller cam environments
• Higher fatigue resistance and tensile strengths than competitor offerings
• Hard chrome stems and friction-welded hard tips for enhanced durability
• Heat treated and stress relieved with swirl polished head
• 10-degree S-Flo flat head design optimizes flow characteristics
• +1mm oversized head diameter for increased valve area

The Ferrea 6000 Series represents one of the most cost-effective valve applications on the market, designed to withstand high RPM and high spring pressure at a budget-friendly price point. Ideal for performance builds, racing applications, and engine rebuilds requiring reliable valvetrain components that deliver proven durability under demanding conditions.