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ARP Main Stud Kit BMW S58
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ARP Main Stud Kit BMW S58

ARP-MSK-S58
Engine
$229.99
$229.99

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This ARP Main Stud Kit is designed to replace BMW part number 11118604584 for the BMW S58 engines found in high-performance models such as G80/G81/G82/G83 M3/M4, X3M F97, and X4M F98. 

Upgrading from factory main bolts to ARP Main Studs is a simple, yet greatly beneficial upgrade. ARP Main Studs offer the following benefits: 

- Uniform Clamping Force: ARP Main Studs provide a uniform clamping force that OEM bolts cannot. With the improved distribution of pressure across main bearing caps comes better, more precise crank alignment for stability and longevity. 
- Improved Block Stability and Rigidity: ARP Main Studs improve block rigidity and therefore stability. This ensures maximum power transfer from the crank to the drivetrain, which in turn ensures: 
- Improved Throttle Response
- Greater Horsepower
- Higher Torque Output
- Prevent Main Cap Walk: This occurs as main caps shift and move out of position, which can cause crank and engine damage
- Reduced Risk of Fastener Stretching: Under high RPM applications and high loads, factory main bolts are prone to stretching and deforming. ARP uses advanced manufacturing techniques and high quality materials for hardware that is much less prone to deformation under load.
- Safeguard Engine Block Threads: Because ARP Main Studs have unmatched tensile strength, they are much less likely to deform or strip block threads under high loads. Additionally, ARP’s precision machining and manufacturing ensures that stud threads are both highly accurate and consistent.

 

When opting for main studs instead of factory bolts, it's important to note that the engine builder should mic the bores. Using studs may require a line hone to ensure proper fitment and alignment. A line hone is a machining process that can be used to resize and reshape the main bearing bores, ensuring that they are perfectly round and concentric. This is crucial for ensuring proper oil clearance and preventing premature bearing wear. By mic'ing the bores and performing a line hone if necessary, engine builders can ensure that the main studs are installed correctly and that the engine will perform reliably and at its best.

Installation Instructions: 
  1. To ensure accurate torque readings and proper thread engagement, thoroughly clean all threads in the engine block. If necessary, use an ARP chaser to chase the threads.

  2. Before installing any hardware, carefully inspect and clean it for defects, shipping damage, and proper fit, length, and dimension.

  3. Gently screw the main studs into the engine block by hand until they are snug.

  4. Install the main caps, checking for any binding or misalignment.

  5. Apply ARP Ultra-torque fastener assembly lubricant to the threads of the studs, nuts, and washers. Install the washers and nuts onto the studs and tighten them by hand. It is highly recommended to use the ARP Ultra-torque fastener assembly lubricant provided with the kit, as it provides consistent clamping force and reduces friction on the studs. Do not use motor oil or other low-quality lubricants.

PRELOAD (TORQUE) RECOMMENDATIONS

7. Following the manufacturers recommended torque sequence tighten the nuts steps 1-3

Step 1: Tighten to 20 ft-lbs.
Step 2: Tighten to 40 ft-lbs.
Step 3: Tighten to 60 ft-lbs.

with ARP Ultra-Torque fastener assembly lubricant

BMW S58 Applications:

2 Series

2023-Present     G87     M2

3 Series

2021-Present     G80     M3

4 Series

2021-Present     G82/G83     M4

X3 Series

2019-Present     F97     X3M

X4 Series

2019-Present     F98     X4M

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We have a 10-day return policy, which means you have 10 days after receiving your item to request a return. Any return or cancellation will be 10% Fee. 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 support@euroklasse.com. If your return is accepted, Items sent back to us without first requesting a return will not be accepted. You can always contact us for any return question at support@euroklasse.com. 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, like perishable goods, 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/ Discounted items or gift cards Or . 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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