Factory head bolts can stretch under higher boost, heavy towing, or elevated cylinder pressure—raising the risk of a lifted head and blown gasket.

The ARP 230-4201 head stud kit is for Duramax 2001-2016. It replaces stretch-prone hardware with ARP fasteners built for high-load diesel use.

What you get

• ARP cylinder-head studs with nuts and washers as supplied in the kit
• ARP Ultra-Torque assembly lubricant (when included per ARP instructions)
• Fitment: Duramax 2001-2016
• Follow ARP installation instructions for your exact kit

Specs

• ARP part number: 230-4201
• Thread reference from ARP instructions: M12 X 1.5, M8 X 1.25
• ARP catalog application: Chevy Duramax diesel '01-'04 (LB-7), '04-pres (LLY) head stud kit

Built for diesel owners who tow, tune, or rebuild—and want head-clamping they can trust. Install with the ARP instruction sheet for 230-4201—use the supplied lubricant and torque or stretch procedure. Verify fitment for your exact engine and year before ordering.