ARP 156-4101 Hex Head Stud Kit for Ford Modular 4.6L/5.4L 2V & 4V (1992-2004)

Vehicle Fitment

• 1992-2004 Ford Modular 4.6 L and 5.4 L V8 (2-valve & 4-valve heads; includes Mustang GT/Bullitt/Mach 1/SVT Cobra); excludes 2005+ 3-valve head engines

Features

• Hex-head stud kit with high-strength 8740 chromoly steel
• Black-oxide finish for corrosion resistance and appearance
• Tensile strength rated at approximately 190,000 psi
• Cold-forged studs, heat-treated prior to thread rolling for durability
• Complete set including studs, hardened washers, and nuts
• Ideal for high-pressure or performance applications (boost/nitrous)
• Reusable hardware - superior to factory torque-to-yield bolts
• Made in the USA, meeting ARP quality standards

Specifications

• Material: 8740 chromoly steel
• Finish: Black-oxide
• Stud count: 20 studs, plus matching washers and nuts
• Tensile strength: ~190,000 psi
• Head style: Hex nut

Included Components

• 1x set of 20 head studs
• 1x set of 20 hardened washers
• 1x set of 20 hex nuts

Product Description

The ARP 156-4101 Head Stud Kit is a direct upgrade for Ford's Modular 4.6 L and 5.4 L V8 engines with 2-valve and 4-valve cylinder heads from 1992 to 2004, including Mustang GT, Bullitt, Mach 1, and SVT Cobra models. Crafted from 8740 chromoly steel and treated for approximately 190,000 psi tensile strength, this kit offers superior clamping reliability compared to factory torque-to-yield bolts. Its black-oxide finish resists corrosion and enhances engine bay aesthetics.

Featuring 20 studs, washers, and nuts, the kit provides full coverage for all cylinder head fasteners and is built for repeated use, making it ideal for high-performance, forced-induction, or rebuilt engines. Note that this kit does not fit Ford Modular engines equipped with 3-valve heads produced from 2005 onward.