Race Master 1.75in. Exhaust Valves for 409 Chevrolet Engines by Manley Performance
Manley's Race Master Exhaust Valves are constructed from XH-426 Stainless Steel 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: 1.75in.
- Stem Diameter: 0.3715in.
- Installed Height: Stock
- O/A Length: 5.105in.
- Tip Length: 0.225in.
- Underhead Angle / Radius: 15°x1/2"
- Margin: 0.08
- Seat Width: 0.1
- Top of Head: 9° Dish
- Weight: 117g
