The Supertech exhaust valve for Subaru H6 applications is a single replacement valve listed at 31.5 x 5.45 x 103.25mm with a black nitride dish profile. Supplied individually, it fits the H6 valvetrain dimensions noted and is intended for targeted exhaust valve replacement when servicing the Subaru H6 cylinder head.
Supertech Subaru H6 31.5x5.45x103.25mm Blk Nitride Dish Exhaust Valve - Single (Drop Ship Only)