VAC Motorsports | ARP Main Stud Kit - BMW S58 Engine
Upgrade your BMW S58 engine with the proven strength and precision of the ARP Main Stud Kit, the ultimate solution for engine stability and longevity under extreme conditions. Engineered to replace BMW part number 11118604584, this main stud kit is a must-have for high-performance builds, track applications, and anyone seeking bulletproof bottom-end reliability from their twin-turbocharged inline-six.
Built for Strength. Designed for Precision.
The factory main bolts in the BMW S58 are sufficient for stock power levels, but when you're increasing boost, RPMs, and engine loads, the need for a more robust fastener becomes critical. The ARP Main Stud Kit eliminates the risk of main cap walk--a condition where the main caps shift under load, leading to misalignment, excessive bearing wear, and even catastrophic engine failure. ARP studs also offer superior clamping force and repeatability compared to factory torque-to-yield bolts.
Protect Your Investment
In addition to securing the main caps, this stud kit also protects the threads in your engine block. Repeated installation and removal of OE bolts can fatigue or damage the block threads. ARP's main studs, made from premium-grade materials with a black oxide finish, distribute the load more evenly and ensure consistent torque readings, reducing the chance of distortion and long-term wear.
Precision Fitment Requires Builder Expertise
It's important to note that replacing main bolts with studs requires precision machining during assembly. Builders must carefully mic the main bores, as the switch to studs often necessitates a line hone to ensure the bores remain perfectly round and concentric. This critical step prevents premature bearing wear and ensures optimal oil clearance, especially in high-RPM or high-horsepower scenarios.
Compatibility
This ARP Main Stud Kit is designed for the BMW S58 3.0L twin-turbo engine, found in the latest generation of BMW M cars. Confirm fitment using your vehicle's VIN or by contacting our team directly.
Fits the Following Models:
| MAKE | MODEL | SUBMODEL | ENGINE | FITMENT NOTES |
| BMW |
F97 |
X3 M |
S58 3.0L |
Use vehicle selector to confirm fitment |
| BMW |
F98 |
X4 M |
S58 3.0L |
Use vehicle selector to confirm fitment |
| BMW |
G80 |
M3 / M3 Competition / M3 Competition xDrive |
S58 3.0L |
Use vehicle selector to confirm fitment |
| BMW |
G82 |
M4 / M4 Competition / M4 Competition xDrive |
S58 3.0L |
Use vehicle selector to confirm fitment |
| BMW |
G83 |
M4 Competition xDrive |
S58 3.0L |
Use vehicle selector to confirm fitment |
| BMW |
G87 |
M2 |
S58 3.0L |
Use vehicle selector to confirm fitment |
Why Choose VAC Motorsports?
At VAC Motorsports, we don't just sell parts--we build engines that win championships. That's why we trust ARP fasteners for our own in-house S58 builds. Whether you're chasing podiums or building the ultimate street M car, upgrading your main fasteners is a small price to pay for peace of mind and mechanical integrity.
Take the next step in your BMW S58 engine build--install the ARP Main Stud Kit and drive with confidence.