This GSC Power Division exhaust valve is specified for Audi V10 5.2L applications: a 27mm head, STD size, 101.8mm length, chrome polished alloy finish and supplied as a single valve. It matches the dimensions listed for that engine head and serves as a direct replacement component where those exact valve measurements are required.
GSC P-D Audi V10 5.2L 27mm Head STD 101.8mm Long Chrome Polished Alloy Exhaust Valve - Single