SKU: 9600141933

MMR Crank Hub 4-Pinned Single Piece Upgrade - BMW / S55 / N55

Sale price$484.20 Regular price$538.00
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Ships within 48 hours · Estimated delivery Aug 16 - Aug 21

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Description

MMR Crank Hub 4-Pinned Single Piece Upgrade - BMW / S55 / N55Engine 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 offers this uprated version of our popular Single Piece Crank Hub, with a 4 Pin dowelled location that locks onto the end of


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 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 centerpiece 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.



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 aluminum 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!


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 9600141933

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Emily McNutt
Lowell, US
★★★★★ 4
Great organizers!
Color: Clear
This is a really practical organizer set. I used it in my bathroom and nightstand drawers, and it helped clean everything up fast. The different sizes are the best part—you can mix and match depending on what you’re storing. Only reason I’m giving 4 stars is because the plastic isn’t super heavy-duty, but it’s still perfectly fine for everyday use. Good value for the amount you get.
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Reviewed in the United States on April 8, 2026
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Amazon Customer
San Leandro, US
★★★★★ 5
Nice drawer organizers with a lot of versatility.
Color: Clear
I bought these to organize my desk drawer because it seems like I can never find anything I'm looking for without taking everything out first,which is always a pain,so I thought why not try a set of drawer organizers.Talk about night and day,these things keep all my stuff tidy and easy to find now,it's great! The plastic doesn't feel cheap either and the different sizes are very versatile,they also come with enough rubber feet for all the containers,though you do have to peel and stick them on yourself,but it's easy and the adhesive feels very strong. I would definitely recommend these if you're looking for some great containers to get things more organized.
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Reviewed in the United States on February 23, 2026
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Kirbyjakobs
Los Angeles, US
★★★★★ 5
Easy to configure. So helpful!
Color: Clear, Color: Clear
My house has old bathroom cabinets that are too narrow for most organizers I have found. These organizers come in different sizes so I can mix and match the pieces to fit the drawers and items I have to store. I have filled two drawers with these and still have more containers to use. These are truly the tool for the job. They are sturdy, stable and I thought I would have trouble with them moving around but they stay in place while maintaining their versatility. If I need to switch out stuff, I just reconfigure the drawer. No assembly required. One of my most favorite simple purchases. I can’t believe I have lived without these simple but helpful organizers!
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Reviewed in the United States on March 8, 2026
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Mandy Rodriguez
Charlottesville, US
★★★★★ 5
Great for lip gloss. Headbands. Little toys and trinkets for preteen
Color: Lilac
This set is great! I love the colors, and my daughter is obsessed with anything purple — light purple, dark purple, all of it 💜. She uses these for all her little trinkets like keychains, Q-tips, headbands, braces, hand sanitizers, little toys, and lip glosses. They’re easy to use, easy to clean, and great quality. She’s had them for a few months now and they’ve held up really well Different sizes. They like up for accessibility
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Reviewed in the United States on May 28, 2026
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Christine Ellis
Chelsea, US
★★★★★ 5
Novelty quality plastic, gorgeous color, and sturdy
Color: Purple
I was a little surprised when I took it out of the pkg. It seemed flimsy. It holds whatever I put in any position, perfectly balanced.
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