Part number VS-VBM6E.

Supertech exhaust valve seal for 6mm valve stem (Viton).

Guide outer diameter -8.8mm. 

Seal outer diameter - 12.2mm.

For:

Opel / Vauxhall - 2.0 16V (Z20LET/LEH)

Audi / VW - 1.8T 2.4 2.7T 2.8 3.0 (5V/cyl.)

BMW - M42, S42, M50, M52, M54, S50 (USA), S52 (USA), S54