Supertech Performance MAIVN-1100-8 Black Nitrided Hi-Flow Intake Valve

The Supertech Performance MAIVN-1100-8 is a high-performance intake valve set engineered for Mazda Miata 1.6L models from 1990 to 1993. These valves are manufactured from SAE EV8 stainless steel, a grade of austenitic stainless with high chromium and manganese content specifically developed for high-temperature valve use. The black nitrided finish provides a hard, smooth exterior while the underlying steel structure retains ductility.

Technical Specifications:

• Head Diameter: 31.00mm (standard)
• Stem Diameter: 5.96mm
• Length: 105.35mm
• Material: Black Nitride
• Groove Type: Single Groove

Key Features:

• Precision-engineered to optimize airflow and combustion efficiency
• Slight necking-down of the valve stem reduces blockage of incoming airflow
• Designed to meet or exceed OEM specifications
• Manufactured from high-quality black nitrided material for superior durability
• Made from one piece of forged stainless steel for ultimate strength and durability

This standard Hi-Flow kit has the same valve diameters and flow characteristics as the OEM valves, making it an excellent OEM replacement option for engine rebuilds or performance upgrades.