ARP 404-4708 CA625+ Head Stud Kit for Audi RS3 / TT-RS 2.5 T (DAZA / DWNA)

Vehicle Fitment

• Audi RS3 (DAZA) 2.5 L TFSI inline-5
• Audi TT-RS (DAZA) 2.5 L TFSI inline-5
• Audi RS3 / TT-RS (DWNA) 2.5 L TFSI inline-5

Features

• CA625+ super-alloy head studs for very high strength
• Rated well above ARP2000 for ultimate clamping performance
• M10 thread size matched to 2.5 T Audi engine head bolt holes
• 12-point nuts included for maximum torque control
• Bottoming nose on the studs allows full thread engagement into the block
• Designed to prevent head lifting under high boost / high RPM conditions
• Excellent fatigue life for performance or racing use
• Reusable studs when installed properly with ARP assembly lube

Specifications

• Material: Custom Age CA625+ (super-alloy)
• Thread: M10 x 1.5 (as per DAZA / DWNA cylinder head)
• Stud style: Bottoming / full engagement nose
• Nut type: 12-point
• Finish: Black-oxide / dark coating
• Torque spec: Use ARP-supplied lubricant and follow ARP torque procedure

Included Components

• Complete set of head studs (for 10-cylinder-equivalent head-bolt holes)
• 12-point nuts for all studs
• Hardened parallel-ground washers
• ARP assembly lubricant
• Instruction sheet with torque sequence

Product Description

The ARP 404-4708 Head Stud Kit is specially designed for the Audi RS3 and TT-RS 2.5 L TFSI inline-5 engines, specifically those using the DAZA and DWNA cylinder heads. Constructed using ARP's advanced Custom Age CA625+ super-alloy, these studs deliver extremely high tensile strength, outstanding fatigue life, and excellent resistance to stress - even in high-boost or high-RPM performance builds.

These studs feature a bottoming nose, which allows the full length of the thread to engage in the engine block, maximizing clamping force. When paired with the included 12-point nuts and hardened washers, this kit significantly improves head gasket sealing and reduces the risk of head lift under extreme conditions. Designed for high-performance and racing applications, the 404-4708 kit is ideal for builders who want maximum reliability in tuned or forced-induction 2.5 T Audi engines.