ARP 157-4301 Head Stud Kit for Select 1989-2009 Land Rover (3.9L / 4.6L) - 10 Bolt Heads

Fits select 1989-2009 Land Rover Defender 90/110, Discovery, and Range Rover models with 3.9L or 4.6L V8 engines and 10-bolt cylinder heads.

Protect your engine's head gasket integrity with the ARP 157-4301 Head Stud Kit. Unlike standard torque-to-yield head bolts that stretch and provide uneven clamping force, these ARP studs are designed to provide a precise, consistent load across the cylinder head. This is a critical upgrade for any Rover V8 rebuild, ensuring the heads remain securely seated even under increased thermal stress or high-performance use.

These studs are manufactured from premium 8740 chrome moly steel, heat-treated to 200,000 psi tensile strength, and centerless ground to ensure perfect concentricity. The threads are rolled after heat-treat, which gives them significantly more fatigue strength than threads cut into softer material. This kit includes all necessary hardware for a complete installation on 10-bolt heads.

• Manufacturer Part Number: 157-4301
• Material: 8740 Chrome Moly Steel
• Tensile Strength: 200,000 psi
• Head Style: 12-Point Nuts
• Includes: Studs, parallel-ground washers, and nuts
• Configuration: Designed specifically for 10-bolt head patterns