Extreme Duty 33mm Exhaust Valve for Subaru WRX EJ205 / STi EJ257 Engines by Manley Performance
Manley's Extreme Duty Exhaust Valves are constructed from XH-432 XtremeAlloy for unparalleled durability. Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance. The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.
Measurements
- Head Diameter: 33mm
- Stem Diameter: 5.96mm/.2345"
- Installed Height: Stock
- O/A Length: 104.75mm
- Tip Length: 3.5mm
- Underhead Angle / Radius: 25°x11/32”
- Margin: 0.06
- Seat Width: 0.1
- Top of Head: 20° Dish
- Weight: 100g
