ARP 157-4301 Head Stud Kit for 1993-2004 Land Rover Defender 90/110 3.9L-4.6L V8

Vehicle Fitment

• 1993-2004 Land Rover Defender 90/110 (Base, 3.9L-4.6L V8)

Features

• High-performance ARP Pro Series head stud kit
• Designed for Rover 3.9L-4.6L V8 engines with 10-bolt heads
• Manufactured from premium-grade 8740 chromoly steel
• Heat-treated to 200,000 psi for superior strength
• Thread rolled after heat treatment for improved fatigue resistance
• 12-point nuts for reduced wrenching hex and wide-area flange
• Undercut shorter studs for more consistent clamping force
• Includes hardened parallel-ground washers for even load distribution

Specifications

• Socket Size: 5/8" 12-point, 3/16" Allen
• Material: 8740 chromoly steel
• Finish: Black oxide
• Undercut Studs: Yes (shorter studs only)
• Washers Included: Yes
• Torque Rating: 200,000 psi

Included Components

• 1x Cylinder head stud kit
• 12x 12-point nuts
• 12x Hardened parallel-ground washers
• 1x Installation instructions

Product Description

The ARP 157-4301 head stud kit is meticulously engineered for Rover 3.9L-4.6L V8 engines featuring 10-bolt cylinder heads, commonly found in 1993-2004 Land Rover Defender 90/110 models. This kit is designed to provide superior clamping force and reliability, essential for high-performance applications or OEM replacements.

Constructed from premium-grade 8740 chromoly steel and heat-treated to 200,000 psi, these studs offer exceptional strength and durability. The studs are thread rolled after heat treatment, enhancing fatigue resistance and ensuring a secure fit. The 12-point nuts feature a reduced wrenching hex and wide-area flange, facilitating easier installation and removal, even in confined spaces.

The kit includes undercut shorter studs, which help equalize the "stretch" of both studs, ensuring more consistent clamping force and compensating for head gasket compression. Hardened parallel-ground washers are also included to promote even load distribution and accurate torque readings. This comprehensive kit is ideal for engine builders seeking to enhance the performance and reliability of their Rover V8 engines.