ARP 241-4501 Cylinder Head Stud Kit Chrome Moly Steel - 8740

The ARP 241-4501 is a professional-grade cylinder head stud kit engineered for high-performance and racing applications. Manufactured from premium 8740 chrome moly steel and heat-treated to 200,000 psi, these studs deliver exceptional strength and reliability that surpasses aircraft-quality standards.

Advanced Manufacturing Process:

• Vertical rack heat-treatment ensures complete and uniform heat penetration to 200,000 psi tensile strength
• Centerless ground construction with multiple precision cuts for exceptional concentricity and straightness
• Thread rolling performed after heat-treat for up to 10 times better fatigue strength than pre-heat-treat threading
• Undercut shorter studs equalize stretch for more consistent clamping force across all fasteners

Key Features:

• Premium 8740 chrome moly alloy steel construction rated at 200,000 psi
• Hex head design for reliable wrench engagement
• Precision manufacturing tolerances allow cylinder heads and gaskets to align perfectly during installation
• Hardened parallel-ground washers included for even load distribution and accurate torque readings
• Undercut stud design compensates for head gasket compression and helps prevent gasket failure

Installation Advantages:

Unlike head bolts that twist during torquing and react to multiple forces simultaneously, studs should be installed finger-tight and stretch only on the vertical axis when the nut is torqued. This provides more accurate and consistent clamping force. The precision tolerances ensure gaskets and cylinder heads glide into position with perfect alignment, critical for racing engines that require frequent servicing.

Each ARP stud is stamped with the ARP logo as assurance of quality and adherence to their zero-defect, zero-failure manufacturing standard. Kit includes all necessary fasteners and hardened washers for complete cylinder head installation.