This Supertech exhaust valve set fits Audi V8 40V engines and includes 16 Inconel exhaust valves at +1mm oversize. Packaged as an engine service set, the Inconel construction noted in the source and the oversize specification indicate suitability where higher temperature-resistant exhaust valves and oversize replacement parts are required for the specified V8 cylinder head application.
Supertech Audi V8 40V Inconel Exhaust Valve- +1mm Oversize - Set of 16