ARP 201-4602 Head Stud Kit for BMW Engine - M30

The ARP 201-4602 head stud kit is engineered specifically for BMW M30 engines, including the 535i models. These high-performance head studs are essential for achieving optimal cylinder head-to-block sealing, particularly in applications using high compression pistons, turbochargers, superchargers, or nitrous oxide systems.

Premium Construction and Materials:

• Manufactured from premium grade 8740 chromoly alloy steel, rated superior to standard aircraft quality materials
• Precision heat-treated to 200,000 psi tensile strength for maximum durability and clamping force
• Centerless ground through approximately ten precision cuts to ensure exceptional straightness and concentricity
• Thread rolled after heat-treat process, providing approximately 1000% better fatigue strength compared to pre-heat-treat threading

Engineering Advantages:

• Exacting tolerances allow cylinder heads and gaskets to align perfectly and glide smoothly into position during installation
• Specially undercut shorter studs equalize stretch characteristics between studs of different lengths
• Consistent clamping force compensates for head gasket compression, preventing blown gaskets and ensuring reliable sealing
• Superior design eliminates the need for thread chasing and ensures proper torque retention

ARP head studs represent the gold standard for engine builders and performance enthusiasts who demand maximum reliability and sealing integrity from their cylinder head assemblies. Each kit includes premium-quality studs manufactured to aerospace-grade specifications.