ARP 235-4331 Big Block Chevy Pro Series Cylinder Head Stud Kit

ARP (Automotive Racing Products) part number 235-4331 is a Pro Series cylinder head stud kit designed for Chevrolet Big Block engines. ARP Pro Series head studs are manufactured from premium alloy steel and engineered to provide superior clamping force and sealing over standard OEM head bolts.

ARP Pro Series Head Stud Construction:

• Cold-forged from premium 8740 chromoly or ARP2000® alloy steel for maximum molecular integrity
• Precision heat-treated vertically in racks to ensure uniform penetration — rated at 190,000 psi (8740 material) or 220,000 psi (ARP2000® material)
• Thread rolled after heat treatment for approximately 20x greater fatigue strength versus pre-heat-treat threaded studs
• Centerless ground for near-perfect concentricity, allowing gaskets and cylinder heads to glide into position with precise alignment
• Includes hardened parallel washers for even load distribution and accurate torque readings
• Each kit ships with ARP's detailed installation instruction sheet including recommended torque values

ARP Pro Series head studs are the preferred choice of professional engine builders for high-performance street, strip, and competition applications. By replacing factory head bolts with studs, cylinder head alignment is dramatically improved, and consistent clamping force is maintained even under extreme heat cycling and pressure.

Note: Verify specific thread dimensions, quantity, and nut style (hex or 12-point) on the ARP product page or instruction sheet included with this kit before installation.