MMR20-1004
Single-piece crank hub with a 4-pin dowelled location that locks onto the end of the crankshaft.
Product features
Additional information
Fitting information
MMR 4-pinned single piece crank hub for BMW N55 & S55
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Engine failures caused by the standard three-piece crank hub on the S55 and N55 engine are (unfortunately) well known, but these are fully addressed with the installation of the MMR Performance 4-pinned single-piece crank hub. Together with the option of adding our Capture Plate for ultimate security.
The OE crank hub unit's friction plate are known to slip rotationally, causing the timing to alter enough that piston-to-valve contact can occur, leaving owners with a very expensive repair bill.
Our 4-pin version of our single-piece crank hub kit is simply the ultimate solution to preventing this problem before it happens on high horsepower engines.
Product fitment.
While every effort has been made to ensure the accuracy of this information, we are not liable for abnormalities or inaccurate data. Customers are wholly responsible for checking fitment for their vehicle.
Where to purchase
Our network of expert MMX Performance dealers can supply our full range, together with product guidance and advice, plus often an experience fitting service.
If you haven't got a MMX Performance dealer close to you, don't worry! Remember you can buy direct from our MMX Performance webshop.
Find a dealerAbout MMX
MMX Performance products have been designed and developed in the UK with passion by enthusiasts, for enthusiasts. All of our products are created in the world's toughest development lab: motorsport. We push the limits and reach new heights on track; then refine our products to give you the performance you need when you want it on the road.
Our extensive range of BMW and MINI upgrades offer unrivalled quality, performance and reliability worldwide; furthermore, every product carrying the MMX logo is thoroughly durability tested both on the road and track, so you can have complete peace of mind that you're installing only the best quality products to unlock the true performance potential from your car.