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