GSC P-D Mitsubishi 4B11T Chrome Polished Super Alloy Exhaust Valve - 30mm Head (+1mm) - Single

This is a single exhaust valve from GSC Power Division, specifically made for the Mitsubishi Lancer models from 2006 and 2009 through 2015. It's designed for the 4B11T engine, featuring a 30mm head that's 1mm larger than stock for potentially improved airflow. The valve is constructed from a super alloy and has a chrome polished finish.

The use of a super alloy in exhaust valves is important because these components operate under extreme heat and stress. This material choice helps ensure the valve can withstand the harsh conditions inside the combustion chamber, maintaining its shape and sealing ability over time. The chrome polished finish not only looks good but can also contribute to smoother operation and reduced friction as the valve moves within its guide.

If you're rebuilding the top end of your 4B11T engine, especially if you're looking to optimize performance, these valves are a solid option. They are designed as a direct replacement, making installation straightforward for someone familiar with engine work. Remember to check the manufacturer's installation instructions for any specific details regarding seating and valve spring compatibility.