The Supertech exhaust valves for Subaru EG33 H6 24V engines are supplied as a set of twelve and are specified as black-nitrided Inconel exhaust valves. These valves are intended as direct replacements for EG33 cylinder heads, offering the high-temperature alloy construction and surface treatment noted in the description to support exhaust valve durability in that engine family.
Supertech Subaru EG33 H6 24V Black Nitrided Inconel Exhaust Valve - Set of 12