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For 551316 Cathedral Port Cyl Head to Rectangle Port Intake Manifold Adapters
$144.79
Sale price
$144.79
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In Stock
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I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
For 551316 Cathedral Port Cyl Head to Rectangle Port Intake Manifold Adapters
Upgrade your engine's induction system with these high-quality aftermarket adapters designed to bridge the gap between cathedral port cylinder heads and rectangle port intake manifolds. These precision-engineered plates allow performance enthusiasts to utilize modern, high-flow intake designs on classic LS-series engine builds, providing a versatile solution for custom swaps and horsepower gains. This is a premium aftermarket component built for durability and ease of installation.
Key Features & Benefits
- Allows seamless installation of rectangle port intakes (LS3, L92, L76) onto cathedral port cylinder heads.
- Precision-machined from high-grade aluminum for a reliable, leak-free seal.
- Optimizes airflow transition between different port shapes for consistent performance.
- Cost-effective aftermarket solution for custom engine builds and modernizing older powerplants.
- Complete set designed to withstand high engine temperatures and pressure.
Compatible Models
- Compatible with LS-series engines featuring Cathedral Port Cylinder Heads.
- Fits rectangle port intake manifolds found on LS3, L92, and L76 engines.
- Reference part number: 551316.
Product Specifications
- Part Type: Intake Manifold Adapter Plates
- Material: Billet Aluminum
- Head Port Style: Cathedral
- Intake Port Style: Rectangle
- Condition: Brand New Aftermarket
Frequently Asked Questions
Is this an OEM part? No, this is a premium aftermarket part designed to meet or exceed original equipment performance standards for custom applications.
How do I confirm compatibility? Please verify that your cylinder heads have the "cathedral" shaped ports and that your intake manifold is designed for "rectangular" ports. You should also cross-reference the part number 551316 with your specific build requirements.
Important: This is a premium aftermarket part and is not manufactured by the original equipment manufacturer (OEM). Brand names and model numbers are used for reference purposes only. Compatibility may vary depending on the machine's serial number. Please verify fitment before purchase.
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Service was professional and easy to work with. They kept me updated on my order and recommended a different part when the one I originally picked wasn’t going to work. Everything showed up as expected and the process was smooth overall.