ARP Main Stud Kit - BMW M40 / M42 / M44 M140I (F20 & F21)(S) 8X71 - Engine no

8X71 - Engine no

high-end and aggressive look

Stable combustion at high RPM

Choose independent front and rear thicknesses (12–15mm) for a square or staggered setup

ARP Main Stud Kit - BMW M40 / M42 / M44 M140I (F20 & F21)(S) 8X71 - Engine noStrengthen the bottom end of your BMW M40 M42 M44 engines with the ARP Main Stud Kit BMW M40 M42 M44, delivering far greater clamping force and sealing than the factory fasteners. Engineered by ARP (Automotive Racing Products), this main stud kit is built to the standards demanded by high performance and motorsport BMW builds. Key Features Designed for BMW M40 M42 M44 engines Significantly increased clamping force over OEM fasteners Improved main cap