ARP 135-4207 Cylinder Head Stud Kit for Big Block Chevy World Products Merlin

The ARP 135-4207 high performance cylinder head stud kit is specifically engineered for Big Block Chevy engines using World Products Merlin aluminum blocks. These premium studs provide superior clamping force and reliability compared to traditional head bolts, making them essential for high-performance and racing applications.

Key Features:

• Manufactured from premium 8740 chromoly steel for exceptional strength and durability
• Heat-treated to 190,000 PSI tensile strength for maximum clamping force
• Precision rolled threads after heat-treat process prevent fatigue failure
• Designed specifically for World Products Merlin aluminum block applications
• Includes hardened parallel-ground washers for even load distribution
• Complete kit includes studs, nuts, and washers for full installation
• Black oxide finish provides corrosion resistance
• Allows for more accurate and repeatable torque readings than head bolts

ARP head studs are the preferred choice of engine builders and racers worldwide. The stud design allows the fastener to be tightened from the top, which applies clamping force more evenly across the cylinder head gasket surface. This superior design reduces the risk of head gasket failure and provides better sealing under extreme cylinder pressures. Each kit includes ARP's premium assembly lubricant to ensure proper installation torque values.