SKU: 9600141933

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

Sale price$484.20 Regular price$538.00
Save 10%

Pay in installments of $134.50 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 20 - Aug 25

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.9 ★★★★★
Based on 19 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
M
Verified Purchase
Marie Phillips
Waukegan, US
★★★★★ 4
Durable Chew Toy That Actually Holds Up to Strong Jaws
Size: Large, Color: Bundle
This is a reliable option for a heavy chewer, especially for a large breed with a strong bite. The material feels tough and well-made, and it stands up well to consistent chewing without immediately breaking down like softer toys tend to do. It also gives a bit of dental benefit by helping reduce plaque and tartar buildup during play, which is a nice bonus since brushing isn’t always realistic. The textured surface keeps it interesting enough to hold attention for a while, and it doesn’t splinter or create a mess. Overall, it’s a solid, durable chew toy that works well for strong chewers who tend to destroy most standard toys quickly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
J
Verified Purchase
Justina Stone
Birmingham, US
★★★★★ 5
Ergonomic good, material so, so
Size: Large, Color: Wishbone
Nice ergonomic, but the plastic come off and dog chew it. I had rather have a stronger material adequate for bigger dogs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
M
Verified Purchase
Myah Meyers
Lake Worth, US
★★★★★ 3
Love it, nice for tough chewers, split in half during play
Size: X-Large, Color: Textured Ring, Size: X-Large, Color: Textured Ring
LOVE THIS PRODUCT, would’ve gotten 5 stars but i threw it for my dog and it split in half on contact with the floor. It had lasted us well over 5 months, it’s not his favorite toy but he’ll pick it sometimes, i wouldn’t say it’s unsafe in half just don’t give the smaller parts!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 18, 2025
J
Verified Purchase
Jh
Phoenix, US
★★★★★ 5
Dogs love them
Size: X-Large, Color: Textured Ring
Great for aggressive chewers . hold up well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
S
Verified Purchase
Sarah Hood
Lexington, US
★★★★★ 5
Great for power chewers
Size: Large, Color: Bundle
Nothing beats Nylabone!!! Our lab has destroyed everything else… even the extra durable black kongs. Finally a chew toy that is super durable and great size.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 12, 2026

recommand products