Crankshaft Hardware

MMX Performance - 4-Pin One-Piece Crank Hub Upgrade Kit - With MMR Ca...

T#:45039725

Part#: MMR20-1004FK

Ships in 4 Business Days

$ 1,227.99 USD

Add to Wish List

Qty

$ 1,227.99 USD

Add to Wish List

The centerpiece of this MMX kit is the UK-made CNC-machined one-piece crank hub, created from billet EN36 steel that's heat-treated with a 0.75mm case hardening, making it incredibly strong and durable. Included are four aerospace precision-machined dowels that mechanically lock the hub to the 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 MMX 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 four-pin location ensures that there is simply no way that the friction plates can ever slip. With the new OE crank bolt tightened appropriately, this delivers a transformational improvement in reliability and peace of mind versus the OE version. Also included is the MMR Crank Bolt Capture Plate. This adds one additional layer of defense, preventing the crank bolt from being able to back out and loosen over time, ensuring everything is tightly held together as intended.

Show More Show Less

BMW M54 Main Bearing Performance Set

T#:26171610

Part#: 5150-HPMBS-M54

Ships in 4 Business Days

$ 274.99

This product was last offered at the strikethrough price on
07-07-2026

$ 219.99 USD

Add to Wish List

Qty

$ 219.99 USD

Add to Wish List

BMW M54 Main Bearing Performance Set is engineered to meet the rigorous demands of high-performance engine builds. Designed by Turner Motorsport, these high-performance coated main bearings offer enhanced durability and efficiency for engines subjected to extreme conditions.

High-Performance Coating: Treated with a specialized coating by Calico, these bearings reduce friction and prevent "spinning" under high stress, making them ideal for high-power applications.
Enhanced Power Generation: The coating allows the engine to generate more power while maintaining reliability, even under demanding conditions.
Thermal Resistance: Built to withstand high temperatures and perform effectively in forced induction and race applications, these bearings help prevent engine failure due to oil pressure loss.
Proven Durability: Tested extensively on and off the track, 5150 bearings are known for their longevity and superior performance compared to other bearings on the market.

Upgrade to the BMW M54 Main Bearing Performance Set from Turner Motorsport for a robust solution that enhances engine reliability and performance.

Show More Show Less

5150 AutoSport High Performance Main Bearing Set, BMW S55

T#:23416567

Part#: 5150-HPMBS-S55

Ships in 4 Business Days

$ 549.99 USD

Add to Wish List

Qty

$ 549.99 USD

Add to Wish List

Performance M5X Main Bearing Set

T#:26171649

Part#: 5150-HPMBS-M50

Ships in 4 Business Days

$ 299.99 USD

Add to Wish List

Qty

$ 299.99 USD

Add to Wish List

5150 High Performance Coated Main Bearing Sets are made for the demands of high performance engine builds. Treated shells and coated by Calico to reduce friction, these bearings allow your engine to generate more power and resist "spinning" under stress. These coated bearings also have thermal resistant properties that not only perform in high HP applications like forced induction or race use, but also help prevent sudden engine failure in the event of oil pressure loss. 5150 bearings have proven themselves on and off the track, lasting longer and outperforming other bearings on the market. Tech Notes: As with all bearings, please check your tolerances and size before installation. Due to the specialized tools needed, professional install recommended.

Show More Show Less

Performance N55 Main Bearing Set

T#:26238415

Part#: 5150-HPMBS-N55

Ships in 4 Business Days

$ 549.99 USD

Add to Wish List

Qty

$ 549.99 USD

Add to Wish List

5150 High Performance Coated Main Bearing Sets are made for the demands of high performance engine builds. Treated shells and coated by Calico to reduce friction, these bearings allow your engine to generate more power and resist "spinning" under stress. These coated bearings also have thermal resistant properties that not only perform in high HP applications like forced induction or race use, but also help prevent sudden engine failure in the event of oil pressure loss. 5150 bearings have proven themselves on and off the track, lasting longer and outperforming other bearings on the market.

Show More Show Less

S55 / N55 One-Piece Crank Hub Upgrade Kit - 4-Pin

T#:19891361

Part#: MMR20-1004

Special Order: No Guaranteed ETA

$ 1,064.99 USD

Add to Wish List

Qty

$ 1,064.99 USD

Add to Wish List

Both the N55 and S55 engines are plagued by the same issue when chasing high horsepower numbers... the dreaded crankhub failure. Fortunately MMR Performance has released an upgraded version of their already stout single-piece crankhub, but this time offering a 4-pin dowelled location that locks onto the front of the crankshaft. This configuration eliminates the multi-piece crankhub with friction discs in favor of a more robust single piece crankhub. Recommended for high-powered cars over 700 Horsepower

Show More Show Less

Genuine Mini Hex Bolt With Washer R5X R6X - Priced Each

T#:405708

Part#: 11117540160

In Stock

$ 9.99 USD

Add to Wish List

Qty

$ 9.99 USD

Add to Wish List

Upgrade your Mini's engine with this high-quality Hex Bolt With Washer designed to attach the bottom engine crank housing to the top engine block. This essential component ensures a secure connection between engine parts, enhancing overall performance and reliability. Trust this genuine Mini part for optimal fit and function in your Mini vehicle.

Enhances engine performance
Ensures secure attachment between engine components
Genuine Mini part for optimal fit and reliability
Easy to install for quick replacement

Show More Show Less

Genuine MINI Connecting Rod Bolt L=45mm - 11241485407

T#:32992

Part#: 11241485407

In Stock

$ 6.99 USD

Add to Wish List

Qty

$ 6.99 USD

Add to Wish List

Genuine MINI CONNECTING ROD BOLT
Fits BMW Engines including:
W10,W11

Timing Chain - Oil Pump

T#:5202590

Part#: 13528648731

In Stock

Sale - Save 21% $ 27.99

This product was last offered at the strikethrough price on
05-03-2026

$ 22.02 USD

Add to Wish List

Qty

Sale - Save 21%

$ 27.99

This product was last offered at the strikethrough price on
05-03-2026

$ 22.02 USD

Add to Wish List

Performance Rod Bearing Set - N55

T#:26238416

Part#: 5150-HPRBS-N55

Ships in 4 Business Days

$ 399.99 USD

Add to Wish List

Qty

$ 399.99 USD

Add to Wish List

5150 High Performance Coated Rod Bearing Sets are made for the demands of high performance engine builds. Treated shells and coated by Calico to reduce friction, these bearings allow your engine to generate more power and resist "spinning" under stress. These coated bearings also have thermal resistant properties that not only perform in high HP applications like forced induction or race use, but also help prevent sudden engine failure in the event of oil pressure loss. 5150 bearings have proven themselves on and off the track, lasting longer and outperforming other bearings on the market.

Show More Show Less

CHAIN

T#:536308

Part#: 13528648731

Ships in 3 Business Days

10% off MSRP $ 104.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 94.99 USD

Add to Wish List

Qty

10% off MSRP

$ 104.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 94.99 USD

Add to Wish List

Project Cars

SELECT YOUR BMW

MMX Performance - 4-Pin One-Piece Crank Hub Upgrade Kit - With MMR Ca...

BMW M54 Main Bearing Performance Set

5150 AutoSport High Performance Main Bearing Set, BMW S55

Performance M5X Main Bearing Set

Performance N55 Main Bearing Set

S55 / N55 One-Piece Crank Hub Upgrade Kit - 4-Pin

Genuine Mini Hex Bolt With Washer R5X R6X - Priced Each

Genuine MINI Connecting Rod Bolt L=45mm - 11241485407

Timing Chain - Oil Pump

Performance Rod Bearing Set - N55

CHAIN

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results