ARP SB Chevy V6 18A hi-port 3/8in holes head bolt kit

The 3/8 inch holes in this ARP head bolt kit are specifically sized for the 18A hi-port cylinder heads commonly found on SB Chevy V6 engines. These bolts are forged from ARP's well-known 8740 chromoly steel, a material chosen for its inherent strength and ability to handle the clamping forces required for proper cylinder head sealing. When you're rebuilding the top end of your V6, using the right fasteners is critical for preventing leaks and ensuring consistent performance.

ARP has a solid reputation for making fasteners that hold up under pressure, and this kit is no exception. The bolts are heat-treated to achieve a tensile strength of 200,000 psi, which means they can withstand significant stress without stretching or failing. This is important because cylinder heads experience a lot of expansion and contraction with temperature changes, and the bolts need to maintain consistent clamping force throughout those cycles. The kit includes all the necessary bolts for your SB Chevy V6, making it a straightforward component to add to your engine build.

For proper installation, always refer to the manufacturer's torque specifications and sequence. Using a quality thread sealant on the bolt threads where they enter the water jacket is also recommended to prevent coolant leaks. This kit is designed to be a direct replacement for your stock head bolts, simplifying the assembly process.