BMW B46 Iron Cylinder Sleeve Set 5150 AutoSport 5150 Xtreme Duty Cylinder Sleeve Set, BMW Toyota B58 5150 AutoSport 5150 Xtreme Duty Cylinder Sleeve Set, BMW N63 5150 AutoSport South Africa 5150 Xtreme Duty Cylinder Sleeve Set, BMW B48. 5150 Xtreme Duty Cylinder Sleeves, also known as cylinder liners, are centrifugally cast, ductile iron cylinder sleeves. Benefits of Engine Sleeving Include: Increased Bore Size: Sleeving your engine gives the opportunity to increase bore size for higher displacement and increased engine capacity, resulting in more power and more torque Increased Strength: Iron sleeves are stronger than alusil when subjected to high power, high stress applications, making the cylinder wall much less likely to crack under high performance conditions Custom Cylinder Wall Thickness: With the ability to install a thicker cylinder wall, prepare your engine for high performance modifications, including high boost, turbo applications Improved Heat Dissipation: By transferring heat more quickly and efficiently, sleeved engines are able to better withstand the higher temperatures associated with high performance applications Improved Engine Longevity: By reinforcing critical areas and transferring heat quickly and efficiently, the risk of catastrophic engine failures under high stress applications is greatly reduced Compatibility with Performance Modifications: sleeved blocks are better equipped to handle a wide range of high performance modifications such as high compression pistons, forced induction systems, and aggressive cam profiles. Cylinder Sleeve Installation Guide Please note that sleeving an engine block is a complex and precise process that requires the expertise of an experienced machine shop or engine builder. It's crucial to consult with professionals who are knowledgeable about BMW engine blocks and high performance engine building to ensure that sleeving is the right choice for your specific goals and requirements. If you aren't sure what components you need, feel free to contact our engine build advising team. 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)