Supertech Performance MAEVI-1206-8 Inconel Exhaust Valves +1mm Oversize

These high-performance valves feature a +1mm oversize head diameter and +0.6mm extended length, designed to maximize flow and durability in high-output applications.

Key Features:

• Inconel/Nimonic superalloy construction provides exceptional high-temperature strength and oxidation resistance
• Sodium-filled design significantly reduces valve head temperatures for improved reliability under boost
• 29.00mm head diameter (+1mm oversize) and 5.94mm stem diameter for optimized flow characteristics
• 102.60mm overall length (+0.6mm longer than standard) for extended valve train compatibility
• Single groove design for standard keeper installation
• Precision-ground seat faces ensure repeatable sealing and proper valve contact
• Hardened tips and controlled stem finish support extended guide life
• Average 10% weight reduction compared to stock valves reduces valvetrain mass

Inconel alloy construction offers superior performance in turbocharged, supercharged, and high-compression builds where exhaust gas temperatures exceed standard operating conditions. The sodium-filled design transfers heat more efficiently away from the valve head, maintaining material strength and allowing for more aggressive spark timing. These valves are ideal for engines producing over 120 horsepower per liter and endurance racing applications that demand sustained high-temperature performance.

Professional installation recommended. Requires proper valve seat cutting to correct angles and contact width. Verify stem-to-guide clearance, installed height, piston-to-valve clearance, and retainer-to-seal clearance during installation. Pair with appropriate valve springs and retainers matched to your camshaft profile for optimal performance.