This is a pair of Shift Guide Bushings (GM 90425648 / Opel 7 58 711) made of brass and compatible with following models: Opel Kadett E, Corsa B, Vectra A, Astra F and Calibra.
They replace the plastic OEM parts that have excessive clearance and wear out quickly.
The original O-Ring (GM 90470871 / Opel 7 36 301) is required for installation.
We have tested this combination in a C20LET Kadett E with F28 transmission and it worked perfectly.