ARP 238-4201 Head Stud Kit 12-pt for 99-07 Caterpillar C15

Vehicle Fitment

• Caterpillar C15 diesel engine (1999-2007); fitment confirmed through 2007; 2008+ unverified

Features

• Precision head stud kit for reliable cylinder head clamping
• 12-point design allows high-torque, multi-angle tightening
• Manufactured using ARP 2000 alloy for exceptional strength
• Centerless-ground studs with tight tolerance concentricity
• Black oxide finish enhances corrosion resistance
• Includes heat-treated chromoly steel nuts and washers
• Improves seal integrity under elevated combustion pressures
• Direct-fit replacement for factory head bolts

Specifications

• Material: ARP 2000 alloy with chromoly hardware
• Finish: Black oxide coating
• Stud design: 12-point head for multi-angle torque
• Manufacturing: Thread-rolled after heat treatment, to MIL-S-8879 specs
• Fitment years: 1999-2007 Caterpillar C15 (later years unconfirmed)

Included Components

• 16x head studs (12-point design)
• 16x matching nuts
• 16x washers

Product Description

The ARP 238-4201 Head Stud Kit is engineered specifically for the Caterpillar C15 diesel engine, covering model years 1999 through 2007. Featuring a robust 12-point head design, the studs allow for precise, multi-angle torque application to ensure even clamp load and prevent head lifting under high combustion pressure.

Manufactured from ARP's premiere ARP 2000 alloy, each stud undergoes meticulous heat treatment and thread-rolling to improve strength and fatigue resistance. The centerless-ground studs provide tight concentricity, while the black oxide finish offers added protection against corrosion. The kit comes complete with high-quality, heat-treated chromoly nuts and washers, making it an excellent upgrade from factory head bolts. Compatibility beyond 2007 has not been verified at this time.