SKU: 65124901717

034Motorsport 1-Piece, Pinned & Unpinned Crank Hub w/ Crank Bolt Capture Plate (4Pin) - BMW N55 & S55

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Description

034Motorsport 1-Piece, Pinned & Unpinned Crank Hub w/ Crank Bolt Capture Plate (4Pin) - BMW N55 & S55A Permanent Fix for the Factory Crank Hub Problem The factory crank hub used in BMWs N55 and S55 engines is a well known weak point, particularly as power levels increase. The OEM design uses three individual sprocketed pieces that drive the timing chains off the crankshaft. Importantly, none of these sprockets are mechanically linked together nor to the crankshaft . They rely only on friction washers and the clamping force of the crank bolt to stay

A Permanent Fix for the Factory Crank Hub Problem

The factory crank hub used in BMW’s N55 and S55 engines is a well-known weak point, particularly as power levels increase. The OEM design uses three individual sprocketed pieces that drive the timing chains off the crankshaft. Importantly, none of these sprockets are mechanically linked together nor to the crankshaft . They rely only on friction washers and the clamping force of the crank bolt to stay aligned.

Under higher horsepower, rapid throttle transitions, hard launches, or even completely stock operation, the friction surfaces can slip. When this happens, the timing components rotate out of alignment, causing the engine to fall out of mechanical timing. This can quickly lead to bent valves, piston-to-valve contact, or catastrophic engine failure.

A True Mechanical Solution Instead of More Friction:

The 034Motorsport 1-Piece Pinned Crank Hub replaces the entire multi-piece factory stack with a single CNC-machined billet EN36 steel unit. By combining all timing sprockets into one rigid body, every driven timing component remains physically linked, eliminating the possibility of internal hub slip.

You can configure the hub in the way that best suits your build:

Unpinned Installation

The 034 design can be installed in an unpinned configuration using the factory crankshaft with no drilling required. This setup works seamlessly with the included Crank Bolt Capture Plate, which locks the crank bolt in position and prevents any chance of bolt movement.

Pinned Installation (Recommended for Heavy Abuse/High Power)

For those who want maximum mechanical security, the hub can also be installed in a 4-pin configuration, physically interlocking it with the crankshaft. One of the key advantages of the 034Motorsport Crank Hub is that it eliminates the need for a separate hub version. You can choose pinned or unpinned using the same part.

To ensure safe and accurate drilling, the kit includes a carbide drill bit and a dedicated drill guide and alignment jig. Most competing kits only provide a high-strength steel drill bit, which wears quickly when cutting into the crankshaft.

Crank Bolt Capture Plate: The Second Layer of Defense

Machined from 6061-T6 billet aluminum and anodized for long-lasting protection, the Capture Plate surrounds and locks the OE crank bolt in place, preventing any possibility of bolt walk-out. Paired with the 1-Piece Hub, this configuration eliminates both crank bolt and crank hub slip, protecting against the most common N55/S55 timing failures.

Elongated mounting slots allow the Capture Plate to be used with both OE and 034Motorsport crank hubs, ensuring a precise and secure installation.

Built to Protect Your Engine, No Matter the Power Level:

From aggressively tuned street builds to fully track-prepped cars, the 034Motorsport 1-Piece Pinned Crank Hub and Capture Plate system is engineered to be the definitive solution for securing the crank hub. With uncompromising materials, precision engineering, and a complete installation package, this upgrade delivers the reliability and confidence your BMW deserves.

Upgrade once. Protect forever.

1-Piece Crank Hub Features:

  • 1-Piece CNC-Machined Hub, Installable In 4-Pin Or Unpinned Configuration
  • Prevents Crank Hub Slip And Failure On High-Power Engines
  • Billet EN36 Steel, Heat-Treated With 0.75 Mm Case Hardening
  • High-Strength Design Built For Extreme Power And Abuse
  • Optional Precision Dowels Mechanically Lock Hub To Crank (Crank Drilling Required)
  • Complete Installation Kit: Jig, Guide, Locating Bolt, And Carbide Drill Bit
  • Includes New OE Crank Bolt

Crank Bolt Capture Plate Features:

  • Machined From 6061-T6 Billet Aluminum
  • Anodized For Durability And Long-Lasting Finish
  • Surrounds And Locks OE Crank Bolt, Preventing Loosening
  • Fits 034Motorsport Or OE Crank Hub With Elongated Slots For Secure Install
  • Prevents 3-Piece Crank Hub Slip On S55 And N55 Engines
  • Installs With Engine In-Situ By Dropping Radiator For Access
Shipping Notes
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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]
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SKU: 65124901717

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4.3 ★★★★★
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Product Reviews
E
Eric Chabot
Massapequa, US
★★★★★ 5
Very Extensive Overview of Major Ethical Issues
Format: Hardcover
Anyone familiar with Wayne Grudem’s Systematic Theology knows how extensive his work tends to be. At 1,328 pages, Christian Ethics: An Introduction to Biblical Moral Reasoning follows that same comprehensive approach, offering a systematic guide to Christian moral reasoning. Grudem’s goal is to help Christians live lives pleasing to God by obeying Scripture and making wise moral choices. His ethical framework is rooted in God’s character and the authority of Scripture, with careful attention to the relationship between Old and New Testament ethics. While many ethical themes are drawn from the Ten Commandments, Grudem argues that the moral law remains applicable today, while the ceremonial and civic laws have passed away with the coming of Christ. Readers will notice that his chapter on civil government is adapted from his earlier work, Politics—According to the Bible: A Comprehensive Resource for Understanding Modern Political Issues in Light of Scripture. Grudem argues that moral right and wrong are grounded in who God is—not in human consensus. God’s attributes (holiness, love, justice, and truthfulness) define what is good. As such, Grudem holds to a form of Divine Command Theory: God’s commands flow from God’s nature. God does not command arbitrarily, because his moral will reflects his unchanging, holy, loving, and just character. God’s nature is the ultimate standard of goodness, and the Good is not external to God (contra Plato). Therefore, Grudem stands within the theological voluntarist tradition associated with Augustine, Calvin, and Reformed orthodoxy. For Grudem, ethics is ultimately about imitating God (Eph. 5:1), which stands in direct opposition to moral relativism and situation ethics. He devotes chapters to honoring God through avoiding idolatry, truthfulness in speech, and faithfulness in Sabbath observance and devotion. Grudem also addresses the moral obligation to protect life, engaging debated issues such as abortion, euthanasia, suicide, war and self-defense, racial discrimination, and substance use and health decisions. He presents arguments alongside counterarguments, seeking to ground his conclusions biblically. Regarding authority, Grudem argues that God exercises authority through parents, societal structures, civil government, and the local church. Christians are called to obey civil authorities, though civil disobedience is justified when the state commands what God forbids. Grudem defends a just war position, arguing that war can be morally justified under certain conditions and that governments are authorized by God to use force to restrain evil. In his view, failing to stop evil can itself become immoral. As a result, he rejects Christian pacifism as an absolute position. Jesus’ commands regarding non-retaliation (e.g., “turn the other cheek”) apply to individual Christians, not to the state’s responsibility to uphold justice. The book also addresses marriage and related ethical questions, including marriage and divorce, birth control, IVF and reproductive technologies, pornography, and contemporary debates surrounding homosexuality and transgenderism—all discussed within a biblical framework. Grudem affirms that divorce is permitted in limited biblical cases (sexual immorality and abandonment), though never ideal. I would add that abuse should also be considered legitimate grounds for divorce. He rejects divorce based on incompatibility, unhappiness, or a “loss of love.” Additional topics include private property, work and rest, wealth and poverty, personal stewardship, debt, business ethics, and environmental care. As in his previous writings, Grudem maintains a complementarian view of gender roles, arguing that God designed men and women for distinct but complementary roles, particularly in the home and the church. Throughout the book, Grudem emphasizes human responsibility, freedom, and moral accountability. Our choices carry real moral weight and real consequences. One of the book’s strengths is its emphasis on the heart in ethical reasoning, serving as a corrective to purely external, rule-based moral frameworks. For Grudem, genuinely Christian ethics begins internally and works outward—a point with which I agree. Drawing from Jesus’ teaching in the Sermon on the Mount (Matt. 5–7), he argues that ethics without heart transformation inevitably becomes legalism. Overall, readers will likely find Grudem’s positions conservative. While he does not dismiss natural law arguments, he clearly adopts a “Scripture-first” approach. This book is especially well suited for pastors, as congregants regularly wrestle with complex ethical questions and need biblically grounded guidance.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 25, 2026
J
Jfarris
Birmingham, US
★★★★★ 3
What one Would Come to Expect
Format: Hardcover
It is typically what you would come to expect from Wayne Grudem. Those familiar with his Systematic Theology will find the material here familiar. Of course, he is dealing with a new set of topics by applying his theological rationale to a set of ethical issues. There a wide set of issues covered here. The reasoning is typical mediocre and the theological development is fine, fair, just ok. Theologically it is a bit thin, but its a nice handy resource, and if you're inclined theologically in a similar direction, then its not a bad collection of essays on important issues that evangelicals need to think about more carefully and critically.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 17, 2024
D
Verified Purchase
Delaney Salazar
Cuba, US
★★★★★ 1
Bad Manufacturing
Format: Paperback
When I got my package. It was in perfect condition, not showing any signs of it being damaged. But then when I started to go through the pages, a couple pages were stained. One page was completely ripped. I thought I could probably just tape it back together, but it was literally missing a chunk of the text. Then I came to the realization I shouldn't have to pay $40 - $50 dollars, and then have to try to fix it and deal with it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 5, 2026
A
Verified Purchase
Adorable123
Pawtucket, US
★★★★★ 5
Worth pvery penny!!
Format: Paperback
I love this book so much because it has rationales!!!, which are very important in knowing why you got a question wrong or right. There are practice questions that helped me a lot as well. I passed my peds exam because of this book, so if you are a NEW nursing student or one about to take a peds class make sure you get this book and practice after every lecture.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 30, 2022
P
Verified Purchase
Peachyki 💗
Lowell, US
★★★★★ 5
Used this a lot!
Format: Paperback
This was a Peds staple for my RN bridge program! Book helped me out a lot! Read those rationales! They are amazing!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 6, 2023

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