Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3415in Stem

Manley Performance has a long history of making strong engine components, especially for racing. This kit is from their Extreme Duty Series, which means it's built for some seriously tough jobs. If you're working on a Big Block Chevy for a marine application, or even a high-powered drag car like a Top Fuel or Funny Car, these exhaust valves are designed to handle the extreme heat and forces involved.

The key to their toughness is the XH-432 XtremeAlloy material Manley uses. It's known for handling extreme conditions. On top of that, these valves have chrome stems and hard tips, which really helps them stand up to wear and tear over time, giving you a longer service life. Manley also put a lot of thought into airflow; the under-head areas are swirl polished to help gases move smoothly, and the combustion faces are fully machined. This helps improve how efficiently your engine breathes and burns fuel.

This kit is specifically for exhaust valves, and it's a solid option if you need components that can take a beating and keep performing. Remember to check the manufacturer's installation instructions for any specific requirements when putting these into your engine build.