The Supertech sodium-filled Inconel exhaust valve set for BMW N54B30A is supplied as 12 valves and is intended for N54B30A exhaust valvetrains. These sodium-filled Inconel valves are provided as a matched set and the listing notes use with locks, making them suitable for engine head service that specifies sodium-filled exhaust valve construction.
Supertech BMW N54B30A Sodium Filled Inconel Exhaust Valve - Set of 12 (Use w/Locks)