ARP 231-4701 Head Stud Kit for GM 2.2L Ecotec L61

The ARP 231-4701 head stud kit is engineered for 1995-2005 Chevrolet Cavalier and other GM vehicles equipped with the 2.2L Ecotec L61 engine. These precision-manufactured studs provide superior cylinder head-to-block sealing, making them essential for high-compression builds and engines running forced induction or nitrous oxide.

Premium Materials and Manufacturing:

• Constructed from premium grade 8740 chromoly alloy steel, far superior to standard aircraft-quality fasteners
• Heat-treated to 200,000 psi tensile strength for maximum clamping force and reliability
• Centerless ground through ten precision passes to ensure near-perfect concentricity and straightness
• Thread rolled after heat-treat for approximately 1000% better fatigue strength compared to pre-heat-treat threading
• Specially undercut shorter studs equalize stretch between upper and lower fasteners for consistent clamping force

Performance Benefits:

• Superior head gasket sealing prevents blown gaskets under extreme cylinder pressures
• Precision tolerances allow cylinder heads and gaskets to align perfectly during installation
• Consistent clamping force compensates for head gasket compression
• Ideal for turbocharged, supercharged, and nitrous-equipped engines
• Direct replacement for OEM head bolts with significantly improved strength

ARP head studs are the preferred choice of professional Sport Compact racers who demand reliable head gasket sealing under extreme operating conditions. The precision manufacturing process ensures proper alignment and even torque distribution across all fasteners.