ARP Main Stud Kits, BMW Engines

Upgrading your engine for optimal performance and reliability requires top-quality components. OEM hardware can potentially create weaknesses that can hinder your engine's full potential, especially if you're supercharging or turbocharging it. That's why we trust ARP, the world leader in fastener technology, for our engine upgrades. ARP Main Studs offer several benefits, including eliminating main cap walk and protecting engine block threads. These studs are crafted in-house from durable 8740 chromoly steel and are heat-treated to withstand extreme conditions.

Using ARP Main Studs on main caps is a popular choice for engine builders and enthusiasts alike because they provide enhanced reliability and performance. Main cap walk can cause significant engine damage, which ARP Main Studs help to prevent. In addition, their high-strength construction makes them ideal for high-performance engines that experience extreme pressure and heat, such as those that are supercharged or turbocharged. Overall, ARP Main Studs 201-5000, 201-5001, 201-5002, 203-5409 are a must-have component for achieving uncompromising performance and reliability in your engine.

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.

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.