GM OEM LS3 L92 L98 Square Port 823 Cylinder Head Set – Cleaned & Ready
Casting #823 – Genuine GM Factory Heads

Up for sale is a genuine OEM GM 823 square port cylinder head set removed from an LS-based engine application. These heads are commonly found on LS3, L92, and L98 engines and are a popular upgrade for many LS builds.

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🔹 Condition:

• OEM Used

• Professionally cleaned

• No visible cracks or damage

• Good overall condition

• Sold as a matched set

(Recommend inspection and resurfacing as needed before installation in performance applications.)

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🔹 Head Details:

• Casting Number: 823

• Square Port Design

• Aluminum Construction

• Compatible with LS3 / L92 / L98 platforms

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🔹 Common Applications:

• Chevrolet Camaro SS (LS3)

• Corvette LS3

• Cadillac Escalade (L92)

• GMC Sierra / Yukon (L92)

• Holden L98 Applications

• Other Gen IV LS-based builds

⚠️ Please verify compatibility with your specific engine build prior to purchase.

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📦 What’s Included:

• (2) OEM GM 823 Square Port Cylinder Heads (Complete as shown)

These 823 heads are highly sought after for performance builds due to their excellent airflow characteristics and strong factory design. Perfect for a stock replacement or performance upgrade.

Review all photos carefully and feel free to message with any questions before purchasing.