The Mercedes 722.6 and 722.9 front cover has long had problems with broken and worn aluminum center hubs. Sonnax steel front cover hub MB-HB-1K is far superior in that it will not crack like the OE cast aluminum hub does. Improvements also have been made by adding a bimetal bushing and lip seal, two common and well-proven methods of piloting and sealing turbine shafts. Instructions are provided to machine the cover and weld the new Sonnax hub in place.

Replaces broken or worn OE aluminum front cover hub
Durable billet steel construction
Bimetal bushing resists wear
Lip seal improves lockup pressure sealing
Comes with bushing and seal already installed

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