• ARP Head Stud Kit for BMW and MINI B38 Engines
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ARP Automotive Racing Products

BMW B48 ARP Head Stud Kit

BMW B48 ARP Head Stud Kit

$299.99 USD
$299.99 USD $299.99 USD
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Type

This ARP2000 Head Stud Kit is designed for the turbocharged inline 4-cylinder B48 engines found in varias BMW chassis and Mini Engines. As you increase the power output of your engine beyond its factory specifications, the head and block may start to separate, causing factory bolts to stretch and fail. ARP Head Studs are stronger than factory bolts, ensuring your race engine stays together even under extreme conditions.Ā 

The Custom Age 625+ option is made from ARP's 625+Ā material that has a tensile strength ofĀ 260 ksi, substantially higher than the 190 ksi of the ARP 2000 head stud. It's an ideal choice for individuals who want to push the limits of their B48Ā builds and require a stronger head stud.

Our Oversized Kit option utilizes ARP's proprietary Custom Age 625+ material option combined with specialized insert washers for ultra-high boost applications. Please note that this kit requires that the cylinder head be clearanced and the engine block to be machined for the installation of insert washers.

Installation Instructions:Ā 

1. To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Chase if necessary with ARP Thread Chaser.
2. Clean and inspect all hardware prior to installation. Look for obvious defects or shipping damages, plus proper fit, length and dimension.
3. If the cylinder head studs protrude into a water jacket, lubricate the block threads of the studs with ARP THREAD SEALER.
4. Screw studs into the block ā€œHAND TIGHT ONLYā€.
5. Install the cylinder head(s) and check for binding or misalignment.
6. Lubricate the stud threads, nuts and washers with ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT.
Then install the washers and the nuts onto the studs and tighten them hand tight.
ARP recommends using the ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that is provided with each kit as opposed to motor oil. This is due to higher friction on the studs as well as inconsistencies in the clamping force of the fasteners when motor oil or other low quality lubricants are used.

Please note: After initial assembly, it is necessary to allow the engine to complete a full heat cycle, then re-torque your head studs to spec. This means allowing the engine to warm up to its normal operating temperature, remain at operating temperature for several minutes to ensure each component is uniformly heated, then turned off and cooled completely to ambient temperature.

PRELOAD (TORQUE) RECOMMENDATIONS

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

ARP2000
Step 1: Tighten to 30 ft-lbs.
Step 2: Tighten to 60 ft-lbs.
Step 3: Tighten to 90 ft-lbs.

Custom Age 625+
Step 1: Tighten to 30 ft-lbs.
Step 2: Tighten to 60 ft-lbs.
Step 3: Tighten to 110 ft-lbs.

with ARP Ultra-Torque fastener assembly lubricant

Bolt Torque Sequence

7 3 1 5
 9
10 6 2 4 8


BMW B48 Applications:

1 Series

2016-2019Ā  Ā  F20Ā  Ā  120i / 125i
2019-2023Ā  Ā  Ā F40 Ā  Ā  118i / 120i / 128ti / 135i / M135i
2024-PresentĀ  Ā  Ā F70 Ā  Ā  120 / M135iĀ 

2 Series

2014-2021 Ā  Ā  F22/F23 Ā  Ā  218i / 220i / 230i
2014-2017Ā  Ā  Ā F45Ā  Ā  Ā 220 / 225i
2021-Present Ā  Ā  G42Ā  Ā  Ā 218i / 220i / 230i
2021-Present Ā  Ā  U06Ā  Ā  Ā 223i
2020-2024Ā  Ā  Ā F44 Ā  Ā  218i / 220i / 228i / M235i
2025-PresentĀ  Ā  Ā F74Ā  Ā  Ā M235

3 Series

2015-2019Ā  Ā  Ā F30/F31/F34Ā  Ā  Ā 320i / 330i / 330e
2018-Present Ā  Ā  G20/G21Ā  Ā  Ā 318i / 320i / 330i / 330e

4 Series

2016-2019Ā  Ā  F32/F33/F36Ā  Ā  420i / 430i
2020-Present Ā  Ā  G22/G23/G26Ā  Ā  Ā 420i / 430i / 430e

5 Series

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

6 Series

2017-Present Ā  Ā  G32 Ā  Ā  630i

7 Series

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

X1 Series

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

X2 Series

2018-2023Ā  Ā  Ā F39 Ā  Ā  sDrive18i / sDrive20i / xDrive20i / 25i / xDrive25i / 28i / M35i
2023-Present Ā  Ā  U10Ā  Ā  Ā xDrive28i / M35i

X3 Series

2017-2024Ā  Ā  Ā G01 Ā  Ā  sDrive20i / xDrive20i / xDrive30i / xDrive30e
2025-PresentĀ  Ā  Ā G45Ā  Ā  Ā xDrive20e / xDrive30e

X4 Series

2018-Present Ā  Ā  G02 Ā  Ā  xDrive20i / xDrive30i

X5 Series

2018-Present Ā  Ā  G05 Ā  Ā  xDrive25i / sDrive25i

Z Series

2018-Present Ā  Ā  G29 Ā  Ā  Z4 sDrive20i / sDrive30i

Toyota B48 Applications:

A90 / A91 Supra

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

MINI B48 Applications:

MINI Hatch [F55/F56/F57]

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

MINI Clubman [F54]

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

MINI Convertible [F57]

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

ARP-HSK-B48-S

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