LLY Duramax Head Stud Kit 2004-2007

Overview

This is a head stud / head bolt fastener kit for the Chevrolet, GMC LLY Duramax diesel (2004-2007). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade LLY Duramax repair or service. Every order ships fast and is backed by our support team.

What It Does & How It Helps

Head studs clamp the cylinder head to the block. The factory torque-to-yield head bolts stretch and lose clamping load under high cylinder pressure, which is why a boosted or tuned diesel lifts a head and pushes a head gasket. A forged head stud kit provides far greater and more consistent clamping force, so the head gasket seals reliably at elevated power. It is essential for any head job on a modified truck and cheap insurance on a stock rebuild.

Fitment

Fits Chevrolet, GMC trucks equipped with the LLY Duramax diesel engine, 2004-2007. Please confirm your engine and year before ordering to ensure correct fitment.

Specifications

• OEM Part Number: 54583+54580+HS54580A+230-4201
• Engine: LLY Duramax
• Year Range: 2004-2007

Quality & Service

Fast shipping on in-stock orders. Free shipping on orders over $70 to the lower 48 states. Backed by Core Diesel Parts — your source for LLY Duramax diesel parts.