S54 Exhaust Hub Upgrade, Dr Vanos - E46 M3, MZ3, Z4M

Stronger and more durable exhaust hub to resist failures

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Price:
$950.00

Forged updated factory hub with cryogenic treatment. For use with stock or modified oil pump disk*.

Dr Vanos offers a stock, factory exhaust hub that has been cryogenically treated to improve strength by 30%. The Dr Vanos hub uses the same tab dimensions as the original BMW hub. Why? The Dr believes a new hub and oil pump disk (with smaller holes) is a better overall packaged solution than re-using a disk with potentially damaged or worn holes. A modified oil disk is strongly recommended (included with a Dr Vanos rebuilt VANOS unit) but you could use it with the original disk*. The Dr Vanos VANOS Hub is a direct replacement for the original.

The tabs on the exhaust cam hub drive the oil pump for the S54 VANOS unit. They act like pins that get inserted into a disc on the back of the VANOS unit. Unfortunately, the holes on the disc are too large which leads the tabs to vibrate inside the holes and eventually crack and break off. Broken exhaust hub tabs on the S54 will cause the VANOS to stop working and if one of the broken tabs ends up in the valvetrain, timing chain, or the oil pump chain, it could be game over for your engine.

* - re-using your original disk with this hub will not reduce rattle or slop in the oil pump operation. While this hub is stronger, the factory "defect" remains. That's why the new machined oil pump disk with smaller holes is strongly recommended. See Related Items below.

The BimmerWorld View: you might have noticed we offer three unique solutions to this inherent S54 problem. Which is the best? We don't really have a Good, Better, Best recommendation here. These are three different approaches with the same result - a more robust and reliable S54 exhaust hub. Your decision may come down to what else you will be changing - the Beisan and Dr Vanos solutions can be used with a stock disk but we urge you to use a modified one. The VAC will only fit with a stock disk. Plan accordingly but you really can't lose with any one of these.

BMW Fitments:
3 Series
E46 (99-05) > M3
Z Series
E36/7 / E36/8 Z3 (96-02) > Z3 M - S54
Z Series
E85 / E86 Z4 (03-08) > Z4 M
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