The Supertech Inconel exhaust valves are a set of eight designed for Mazda MZR and Ford Duratec 2.0L/2.3L engines. Supplied as direct replacement exhaust valves, they use Inconel as specified in the source title and are intended for builders and engine rebuilds needing component-level exhaust valve replacement. Sold in complete sets for multi-cylinder engines.
Supertech Mazda MZR / Ford Duratec 2.0L/2.3L Inconel Exhaust Valve - Set of 8