Brian Crower Mitsubishi 4G63 Eclipse/Evo 31.5mm Exhaust Valves

These Brian Crower 31.5mm exhaust valves are built with a specific material choice in mind: high-grade stainless steel. This isn't just any steel; it's chosen for its ability to handle the intense heat and pressure found in the exhaust port of performance engines like the Mitsubishi 4G63. If you're rebuilding the top end of your Eclipse, Talon, Laser, Lancer, or Galant, these valves are a solid option for ensuring reliable performance and longevity.

The 31.5mm diameter is a key measurement here, designed to work with many popular 4G63 cylinder head configurations. Brian Crower focuses on making parts that fit right and perform well, and these exhaust valves are no exception. They're made to handle the demands of an engine that's working hard, whether it's a daily driver or something built for more spirited use. You can expect improved exhaust flow compared to stock, which helps your engine breathe better and can contribute to better overall performance.

When you're putting an engine back together, using well-built components makes a difference. These Brian Crower valves are a popular choice for 4G63 builds because they offer a good balance of performance and durability. Make sure to check your specific cylinder head and piston combination to confirm compatibility, but for many 4G63 applications, these are a direct fit.