ARP 204-3901 Head Bolt Kit for Volkswagen 1.8L Turbo 20V (M10, No Tool)

Vehicle Fitment

• 1997-2005 Volkswagen Golf (Mk3-Mk5)
• 1997-2005 Volkswagen Jetta (Mk3-Mk5)
• 1997-2005 Volkswagen Passat (B3/B4/B5)
• 1997-2005 Audi A3
• 1997-2005 Audi TT

Features

• Manufactured from premium-grade 8740 chromoly steel
• Heat-treated to a nominal tensile strength of 200,000 psi
• Precision CNC-machined to exacting specifications
• Threads rolled after heat treatment for superior fatigue strength
• 12-point head style for improved wrenching access
• Designed for use with M10 threaded blocks
• Compatible with internal water pump 06A engine blocks
• Kit includes all necessary bolts, washers, and nuts

Specifications

• Socket Size: 10mm internal tri-square
• Material: 8740 chromoly steel
• Tensile Strength: 200,000 psi
• Thread Type: Rolled threads
• Compatibility: OEM cylinder heads
• Drivetrain: FWD, AWD

Included Components

• 10x Head bolts
• 10x Hardened parallel-ground washers
• 10x Nuts
• 1x Installation instructions

Product Description

The ARP 204-3901 Head Bolt Kit is engineered for Volkswagen and Audi 1.8L turbo 20V engines equipped with M10 threaded blocks and internal water pumps. This kit is ideal for enthusiasts and professionals seeking to replace the factory torque-to-yield (TTY) bolts with high-performance fasteners that offer superior strength and reliability.

Constructed from premium-grade 8740 chromoly steel and heat-treated to a tensile strength of 200,000 psi, these bolts provide a 40% increase in tensile strength over OEM TTY bolts. The precision CNC-machining ensures exacting specifications, while the rolled threads after heat treatment enhance fatigue strength.

The 12-point head style allows for improved wrenching access, and the kit includes all necessary bolts, washers, and nuts for a complete installation. Whether you're building a high-performance street engine or preparing for track use, the ARP 204-3901 Head Bolt Kit delivers the strength and reliability needed for demanding applications.