Factory main bolts can be a weak link when cylinder pressure climbs. Stronger main studs help keep the bottom end locked in place under load.

The ARP 230-5402 main stud kit is for 2006-2010 Duramax. It replaces stretch-prone hardware with ARP fasteners built for high-load diesel use.

What you get

• ARP main studs with nuts and washers as supplied in the kit
• ARP Ultra-Torque assembly lubricant (when included per ARP instructions)
• Fitment: 2006-2010 Duramax
• Follow ARP installation instructions for your exact kit

Specs

• ARP part number: 230-5402
• ARP catalog application: Chevy Duramax diesel '06 & later LBZ/LMM main stud kit

A solid choice for rebuilds and higher-power diesel bottom-end work. Install with the ARP instruction sheet for 230-5402—use the supplied lubricant and torque or stretch procedure. Verify fitment for your exact engine and year before ordering.