Upgrade your LS build with these billet aluminum rectangular port intake manifold adapter plates, designed to bridge cathedral port cylinder heads to rectangle port intake manifolds, superchargers, or blowers. This setup allows greater flexibility when pairing modern intake systems with earlier LS cylinder head configurations.

Machined from high-strength billet aluminum and finished with a durable anodized coating, these adapters provide precise port alignment, reliable sealing, and long-term durability under high-performance conditions. Ideal for forced-induction or high-output naturally aspirated builds.

Key Features:

• Cathedral to Rectangle Port Conversion – Allows rectangle port intakes or superchargers to be used on cathedral port cylinder heads.
• Billet Aluminum Construction – Machined from high-strength aluminum for rigidity and thermal stability.
• Precision CNC Machining – Ensures accurate port alignment for optimal airflow and performance.
• Anodized Finish – Corrosion-resistant coating for long-term durability.
• High-Quality Sealing – Includes premium O-ring seals for leak-free operation.
• Alignment Pin Clearance – Designed to clear factory alignment pins without modification.

Specifications:

• Condition: New
• Product Type: Intake manifold adapter plates
• Material: Billet aluminum
• Finish: Anodized
• Thickness: 1/2 inch

Compatibility:

• Compatible with cathedral port cylinder heads
• Adaptable to rectangle port intake manifolds, superchargers, or blowers

Important Notes:

• Not compatible with raised port LS7 intake designs
• Some rectangle port intakes may require minor port matching or polishing
• Correct intake bolt length must be selected based on intake style used

What’s Included:

• 2x intake manifold adapter plates
• O-ring seals

These adapter plates are an essential solution for builders looking to expand intake options on cathedral port LS engines while maintaining proper airflow and sealing. Ideal for performance street builds, track cars, or boosted applications.