Kies Motorsports Crank Bolt Lock for S55, N55, and N54

Many in stock
$139.00 $119.00
Introducing the all-new Kies Crank Bolt Lock! The Kies Crank Bolt Lock acts to "lock" the...

Introducing the all-new Kies Crank Bolt Lock!

The Kies Crank Bolt Lock acts to "lock" the crank bolt on the S55, N55, and N54 in an effort to prevent the crank bolt from backing out, which can lead to catastrophic engine failure. By locking the bolt into place, you virtually eliminate the possibility of the crank bolt working its way loose. Please note, by adding the Kies Crank Bolt Lock, it is still possible to spin a crank hub, however, it lessens the risk of the hub spinning because of a loose crank bolt. We highly encourage the use of this product in conjunction with a 4 pin crank hub upgrade.

With the Kies Crank Bolt Lock, we wanted to do something different than what's on the market today and it was important to us that we had the product engineered and manufactured right here in the USA. 

First, we realized that there were situations where we needed to put a socket on the crank bolt to turn the engine by hand, so we built in a 32mm hex on the end of our billet 6061 aluminum crank bolt lock. By doing this, you don't need to remove the bolt lock to do other engine work! Next, we designed a single steel washer to lock the unit down, instead of using 6-8 tiny washers. This ensures the best pressure distribution and ensures the easiest installation. 

The Kies Crank Bolt Lock is available in an 8 Bolt version for the N55 and S55 and a 6 Bolt for the N54. Please note that in some occasions, the N54 can have an 8 Bolt Crank Hub. We recommend physically inspecting to see if your vehicle requires a 6 or an 8 bolt version on all N54 engines. 


- Proudly Made in the USA

- Available in both 6 and 8 Bolt Options 

- Machined 32mm Hex for Ease!

- Precision CNC Billet 6061 Aluminum Kies Bolt Lock

- Kies Blue or Stealth Black Anodized Finishing 

- Stainless Steel or Black Zinc Plated Single Washer

- 12.9 Strength Alloy Steel Silver or Black Zinc Plated Bolts 



Please note, we designed the Kies Bolt Lock in a way where it will bolt right up to your crank pulley/hub with ease, however, in rare occurrences, the crank bolt may need to be slightly stretched. Please ensure that the provided bolts are threading into the crank hub with ease before a final torque of 40nm per bolt in a star pattern. Medium strength Loctite is highly recommended.
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We have a 7-day return policy, which means you have 7 days after receiving your item to request a return. There is a 15% restocking fee. For turbos there is a 25% restock fee on canceled or returned orders To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. To start a return, you can contact us at If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted. You can always contact us for any return question at Damages and issues Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right. Exceptions / non-returnable items Certain types of items cannot be returned, custom products (such as special orders or personalized items),. We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item. Unfortunately, we cannot accept returns on sale items or gift cards. Exchanges The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item. Refunds We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

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