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MMR CRANK HUB 4-PINNED SINGLE PIECE UPGRADE I BMW S55 I N55
MMR CRANK HUB 4-PINNED SINGLE PIECE UPGRADE I BMW S55 I N55
MMR CRANK HUB 4-PINNED SINGLE PIECE UPGRADE I BMW S55 I N55
MMR CRANK HUB 4-PINNED SINGLE PIECE UPGRADE I BMW S55 I N55
MMR CRANK HUB 4-PINNED SINGLE PIECE UPGRADE I BMW S55 I N55
MMR CRANK HUB 4-PINNED SINGLE PIECE UPGRADE I BMW S55 I N55
MMR CRANK HUB 4-PINNED SINGLE PIECE UPGRADE I BMW S55 I N55
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MMR CRANK HUB 4-PINNED SINGLE PIECE UPGRADE I BMW S55 I N55

MMR
MMR20-1004FK
Engine Performance
£899.99
Engine failures caused by the standard three-piece crank hub on the S55 & N55 engine are (unfortunately) well known, but these are fully addressed with the installation of the MMR Performance 4-Pinned Single-Piece billet Crank Hub, together with the option of adding our Capture Plate for ultimate security.  MMR Performance now...
£899.99

Engine failures caused by the standard three-piece crank hub on the S55 & N55 engine are (unfortunately) well known, but these are fully addressed with the installation of the MMR Performance 4-Pinned Single-Piece billet Crank Hub, together with the option of adding our Capture Plate for ultimate security. 

MMR Pinned Crank Hub

MMR Performance now offers this uprated version of our popular Single-Piece Crank Hub, with a 4-Pin dowelled location that locks onto the end of the crankshaft. 

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.

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.

The centrepiece of the MMR kit is the UK made CNC-machined one-piece crank hub, created from billet EN36 steel that's been heat-treated with a 0.75mm case hardening, making it incredibly strong and durable. Along with this comes four aerospace precision machined dowels 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.

MMR Pinned Crank Hub BMW S55

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.

As MMR Performance offers two versions of the Single-Piece Crank Hub, which is best for you, pinned or unpinned?  For most standard to Stage 1 tuned S55 & N55 engines, the unpinned MMR Single-Piece Crank Hub (MMR20-1003) is more than sufficient. Installation is more straightforward as the end of the crankshaft does not need to be precision drilled to mount the four locating dowels. However, for high power/torque engines tuned beyond this level, we recommend this upgraded pinned version of the Crank Hub that incorporates the 4-pin dowel drive mounting for the ultimate engine security.

OE Multi-Piece Crank Hub (L) compared to MMR Single Piece Crank Hub (R) 

Finally. as another option alongside the 4-Pinned Crank Hub, adding the MMR Capture Plate ensures that owners have complete peace of mind. 

The Capture Plate removes the possibility for the crank bolt to be able to loosen with the engine's vibrations or harmonics. The Capture Plate is an additional billet aluminium hat that securely bolts over the entire head of the crank bolt, making it literally impossible for the bolt to come undone. Please select from the product option below at point of ordering to include a Capture Plate with your order.

Single-Piece Crank Hub (L) with Capture Plate (R)

S55 and N55 bolt torque – 100Nm initial torque plus 270 degrees.

For BMW M2C, M3 and M4 S55-engined cars running high power and torque tuning setups, and N55-powered M2, M135i, M235i, 335i & 435i cars, MMR have engineered the most comprehensive solution on the market and at one of the most compelling price points. Don't run high power without one!

 

Read our Blog about the Crank Hub problems here:

 

This will fit all models with N55 and S55 engines. Most popular models:

 

BMW M2 F87 2015-2018

BMW M2 Competition F87 2018-2021

BMW M3 F80 - 2014-2019

BMW M4 F82 - 2014-2020

 

BMW M135i F2x 2011 - 2019

BMW M235i F2x 2013 - 2020

BMW 335i F3x 2011-2019

BMW 435i F3x 2013-2020

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Do we ship abroad ?

Yes we do, to almost anywhere in the world though remember the postage is often high when shipping anything bulky. Most bulky items we export will go by UPS so you can track the package online and could reach America within 48 hours providing its in stock !

However there are a few countries we do not ship to, some of these include: Israel, Thailand, Malaysia, Indonesia, Russia, Nigeria, Macedonia, Syria, Ukraine, Lebanon.

Why is postage on bulky items to some countries expensive compared to some other companies ?

LFor both yours and our safety we use well known couriers such as DPD Local and UPS for shipping, then we know exactly where it is in the world at any time and we know its going to arrive safely. Shipping small items can be cheap, but items such as bodykits are expensive to ship - we have a very small margin on the postage fees merely to cover packaging. We can now ship using standard post on some items, however using all methods you may incur import charges when you receive the goods for which we cant be responsible for.

BREXIT 2021 EUROPEAN TAXATION CHANGES:

For European Customers prices now displayed in cart once you enter your address will have 20% UK VAT Tax removed, however you will have to pay some form of Duties / VAT prior to delivery of your goods.

If you are unsure of charges we recommend you should contact your local authorities ahead of placing your order.

Availability:

Not everything on our website is in stock, if you need a part desperately please contact us first to confirm availability before placing your order.

How do I place an order if I live within the UK ?

You can either order here in our online shop or you can phone us or email us, using the following number/address are below.

Phone: 07985319479

Email: darkroadperformance@outlook.com

How do I place an order if I live outside the UK ?

Returns Procedure:

- Before returning any goods please read all our terms and conditions. - Dark Road Performance must be informed by e-mail or telephone on 0044 (0) 7985319479 of any items that you wish to return for credit or exchange within 7 working days commencing the day of delivery. A member of staff will provide you with a Returns Notice Number. - Please also ensure that you include a copy of your invoice when shipping any items back to us as well as your Returns Notice Number. - If an item is sent back to us without a Returns Notice Number; a refund will not be given. - No parts that have been used, fitted or installed will be accepted for Credit or Refund. - Any parts returned must be in resalable condition. - We will not under any circumstances pay any VAT/Import Duties on Returns, If we are requested to do so your return will be rejected/abandoned.

For orders that have been supplied correctly & assuming goods are in re-saleable condition: -Within 14 days from the day of delivery - Goods can be returned for ANY reason for a full refund of goods and initial delivery charge. -We do not cover returns postage back to us -After 14 days from the day of delivery - Goods can be returned but with a 20% handling charge. The initial delivery charge & return delivery charges will NOT be refunded. -After 28 days from the day of delivery – Goods are not accepted back for refund.

For orders that have been supplied incorrectly & assuming goods are in re-saleable condition: -Within 28 days from the day of delivery – Goods can be accepted back for full refund, refund for initial shipping and refund for return shipping. -If goods are not in re-saleable condition e.g fitted/test fitted, original packaging not present, covered in grease/lube etc, supplied correctly or incorrectly we will not accept for a refund.

At our discretion, we may drop ship your order direct from a UK supplier. If we arrange to drop ship an item it will be arranged internally, you only pay the price agreed in advance.

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