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. The Custom Age 625+ option is made from ARP's 625+ material that has a tensile strength of 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 B48 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: 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 “HAND TIGHT ONLY”. 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 2016-2019 F20 120i / 125i2019-2023 F40 118i / 120i / 128ti / 135i / M135i2024-Present F70 120 / M135i 2 Series 2014-2021 F22/F23 218i / 220i / 230i2014-2017 F45 220 / 225i2021-Present G42 218i / 220i / 230i2021-Present U06 223i2020-2024 F44 218i / 220i / 228i / M235i2025-Present F74 M235 3 Series 2015-2019 F30/F31/F34 320i / 330i / 330e2018-Present G20/G21 318i / 320i / 330i / 330e 4 Series 2016-2019 F32/F33/F36 420i / 430i2020-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 / 28i2022-Present U11 sDrive18i / xDrive20i / xDrive28i / M35i X2 Series 2018-2023 F39 sDrive18i / sDrive20i / xDrive20i / 25i / xDrive25i / 28i / M35i2023-Present U10 xDrive28i / M35i X3 Series 2017-2024 G01 sDrive20i / xDrive20i / xDrive30i / xDrive30e2025-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 Supra2020-Present GR Supra 2.0 MINI B48 Applications: MINI Hatch [F55/F56/F57] 2014-Present Cooper S2015-Present John Cooper Works (JCW) MINI Clubman [F54] 2015-Present Cooper S2016-Present John Cooper Works (JCW) MINI Convertible [F57] 2016-Present Cooper S2016-Present John Cooper Works (JCW)
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