[IND-Distribution]

Issues relating to the standard three-piece crank hub on the S55 & N55 engine are (unfortunately) widely known, but these are fully addressed with the installation of one of the MMR Performance one-piece billet Crank Hub Kits.

The OE crank hub unit's friction plate are known to slip, causing the timing to alter enough that piston-to-valve contact can occur and, if not totally standard and within the warranty period, leaves owners with a very expensive repair bill!

MMR has developed 2 versions of a Crank Hub Upgrade Kit:

1. The one-piece Crank Hub together with thier Capture Plate ensures owners have complete peace of mind, whether on an untuned factory car or equally for those that wish to increase the power and torque output significantly without ever having to worry again; MMR have engineered the most comprehensive solution on the market and at one of the most compelling price points.
   
   The MMR Performance one-piece crank hub is machined from billet EN36 that's been heat-treated with a 0.75mm case hardening, making it incredibly strong and durable. The one-piece design ensures the friction plates can no longer slip and with a new crank bolt tightened appropriately, this alone delivers the transformational improvement in reliability versus the OE version. Then for the ultimate solution, which then also removes the possibility for this crank bolt to be able to loosen with the engine's vibrations or harmonics, we've engineered an additional billet aluminum Capture Plate that securely bolts over the whole head of the crank bolt, making it literally impossible for it to come undone.
   
2. 
   For high-hp cars (700hp+) MMR Performance now offers this uprated version of their popular Single-Piece Crank Hub, with a 4-Pin dowelled location that locks onto the end of the crankshaft.
   
   This 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 & torque engines.
   
   Using the same CNC-machined one-piece crank hub, this version also comes with four aerospace-quality dowel pins that mechanically lock the hub to end of the crank itself, plus a brand new OE bolt.
   
   Installation of these dowels is certainly not a DIY job. But to make the job easier for the professionals, ensuring that the required crank modifications are made safely and accurately, the MMR kit also includes a full installation jig that includes a bolt-on drilling guide, a location bolt for this guide, plus an HSS rolled high speed Drill Bit.
   
   Together, the Single-Piece design combined with the 4-Pin location ensures that there is now no way that the friction plates can ever slip. With the new OE crank bolt tightened appropriately, this delivers a transformational improvement in reliability versus the OE version.

The MMR Performance BMW S55 / N55 One-Piece Crank Hub Upgrade Kits may be viewed at the following links to our online store:
With Capture Plate: https://ind-distribution.com/product...ub-upgrade-kit
4-Pin Keyed Kit: https://ind-distribution.com/product...rade-kit-4-pin

Please contact IND by phone or email for more information or to place your order.
866.963.4520 | info@ind-distribution.com

[IND-Distribution]

For high-hp cars (700hp+) MMR Performance now offers this uprated version of their popular Single-Piece Crank Hub, with a 4-Pin dowelled location that locks onto the end of the crankshaft.

This 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 & torque engines.

Using the same CNC-machined one-piece crank hub, this version also comes with four aerospace-quality dowel pins that mechanically lock the hub to end of the crank itself, plus a brand new OE bolt.

Installation of these dowels is certainly not a DIY job. But to make the job easier for the professionals, ensuring that the required crank modifications are made safely and accurately, the MMR kit also includes a full installation jig that includes a bolt-on drilling guide, a location bolt for this guide, plus an HSS rolled high speed Drill Bit.

Together, the Single-Piece design combined with the 4-Pin location ensures that there is now no way that the friction plates can ever slip. With the new OE crank bolt tightened appropriately, this delivers a transformational improvement in reliability versus the OE version.