BMW B48 ARP Main Stud Kit

$199.99
$199.99
$199.99
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This ARP Main Stud Kit is designed for the BMW B48 Engine

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. U sing 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 B48 Applications:

1 Series

2016-2019 F20 120i / 125i
2019-2023 F40 118i / 120i / 128ti / 135i / M135i
2024-Present F70 120 / M135i

2 Series

2014-2021 F22/F23 218i / 220i / 230i
2014-2017 F45 220 / 225i
2021-Present G42 218i / 220i / 230i
2021-Present U06 223i
2020-2024 F44 218i / 220i / 228i / M235i
2025-Present F74 M235

3 Series

2015-2019 F30/F31/F34 320i / 330i / 330e
2018-Present G20/G21 318i / 320i / 330i / 330e

4 Series

2016-2019 F32/F33/F36 420i / 430i
2020-Present G22/G23/G26 420i / 430i / 430e

5 Series

2017-Present G30/G31 520i / 530i / 530e

6 Series

2017-Present G32 630i

7 Series

2015-2022 G11/G12 730i / 730Li / 740e / 740Le

X1 Series

2015-2022 F48 sDrive18i / sDrive20i / xDrive20i / 25i / xDrive25i / 28i
2022-Present U11 sDrive18i / xDrive20i / xDrive28i / M35i

X2 Series

2018-2023 F39 sDrive18i / sDrive20i / xDrive20i / 25i / xDrive25i / 28i / M35i
2023-Present U10 xDrive28i / M35i

X3 Series

2017-2024 G01 sDrive20i / xDrive20i / xDrive30i / xDrive30e
2025-Present G45 xDrive20e / xDrive30e

X4 Series

2018-Present G02 xDrive20i / xDrive30i

X5 Series

2018-Present G05 xDrive25i / sDrive25i

Z Series

2018-Present G29 Z4 sDrive20i / sDrive30i

Toyota B48 Applications:

A90 / A91 Supra

2019-Present J29/DB82/DB22 Supra
2020-Present GR Supra 2.0

MINI B48 Applications:

MINI Hatch [F55/F56/F57]

2014-Present Cooper S
2015-Present John Cooper Works (JCW)

MINI Clubman [F54]

2015-Present Cooper S
2016-Present John Cooper Works (JCW)

MINI Convertible [F57]

2016-Present Cooper S
2016-Present John Cooper Works (JCW)

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