ARP 404-4708 Custom Age 625+ Head Stud Kit for Audi RS3/TT-RS 2.5T TFSI

The ARP 404-4708 Head Stud Kit is engineered specifically for Audi RS3 and TT-RS models equipped with the 2.5L TFSI inline-5 engine (DAZA/DNWA engine codes). This premium head stud kit utilizes ARP's advanced Custom Age 625+ super-alloy material, providing superior clamping force and reliability for high-performance and forced induction applications.

Custom Age 625+ Material Benefits:

• Exceptional tensile strength of 260,000-280,000 psi, significantly stronger than standard 8740 or L19 materials
• Superior fatigue cycle life for long-term durability under extreme conditions
• Complete resistance to atmospheric corrosion and oxidation
• Enhanced toughness to withstand high combustion pressures
• Ideal for turbocharged and high-boost applications

Precision Manufacturing:

• 12-point head design for precise torque application
• Thread rolled after heat treatment for 1000% better fatigue strength
• Centerless ground for exceptional straightness and concentricity
• Heat-treated vertically in special racks to ensure complete heat penetration
• Manufactured to exacting tolerances for perfect alignment during installation

This head stud kit provides the superior clamping force required to keep cylinder heads securely fastened under high boost pressures, making it essential for modified engines producing elevated power levels. Each kit includes premium-quality studs and all necessary hardware for a complete installation.