Supertech Performance MEVI-1019-8 Inconel Exhaust Valve Set +1mm Oversize Mitsubishi 4B11 EVO X (8 Valves)

These valves feature a +1mm oversize design with a 30.00mm head diameter, 5.46mm stem diameter, and 105.9mm length to accommodate machined valve guides and seats.

Key Features:

• Inconel superalloy construction for superior high-temperature strength and oxidation resistance
• Engineered for turbocharged and supercharged applications that experience extreme exhaust gas temperatures
• +1mm oversize design accommodates guide and seat reconditioning during performance head builds
• Precision machined seat geometry for reliable sealing under sustained boost and competition duty cycles
• Maintains structural integrity during extended track sessions and repeated heat cycles

Supertech Inconel exhaust valves are ideal for racing applications including drag racing, rally, road racing, and endurance competition where elevated exhaust temperatures are sustained. These valves deliver the durability required for turbocharged engines operating under prolonged boost conditions. Professional installation recommended with proper valve seat cutting, stem-to-guide clearance measurement, and spring pressure verification per your camshaft specifications.