Manley 90-99 Mazda Miata 1.8L (BP056) DOHC 16 Intake 33mm Stainless Race Master Valves

If you're rebuilding the top end of your 1994-2005 Mazda Miata's 1.8L DOHC engine, these Manley Race Series intake valves are a solid option. They're built from high-quality stainless steel, which is crucial for handling the heat and stress inside the combustion chamber. The 33mm Race Master style means they have a straight stem, designed to optimize airflow into the cylinders.

Manley has put some thought into these valves. They feature chrome stems and hard tips to resist wear over time, and the under-head areas are swirl-polished to help smooth out the air entering the engine. The combustion faces are also fully machined, which further aids in efficient airflow and combustion. These are well-built valves intended for engines that will see some action, especially if you're running alcohol fuels, where they're specifically recommended for exhaust applications, though the intake valves benefit from the same robust construction.